Build Arti

Stats and Race (32pt build):
Halfling
Str: 24 (11 base +2 tome +6 item +2 rage +2 rams might +1 LotD)
Dex: 28 (17 base +2 halfling +2 tome +6 item +1 LotD)
Con: 24 (14 base +2 tome +6 item +2 rage )
Int: 36 (17 base +2 tome +5 levels +2 enhancements +6 item +3 exceptional +1 LotD)
Wis: 16 (8 base +2 tome +6 item)
Cha: 16 (8 base +2 tome +6 item)
Ability increase every 4 levels: All in Intelligence

Skills : Keep Concentration, Search, Disable Device, Haggle, Spot, Balance, Move Silently and UMD maxed at all levels. Tumble (1), Jump (~5), Open Lock (~10). Left overs in Hide? Bluff? Diplomacy?

Feats (by level (7)): Point Blank Shot (1), Toughness (3), Precise Shot (6), Power Attack (9), Improved Critical: Ranged (12), Improved Precise Shot (15), Greater Two Weapon Fighting (18)
Feats (Ranger): Strength Shot (1), Favoured Enemy: Construct (1), Rapid Shot (2), Two Weapon Fighting (2), Diehard (3), Favoured Enemy: Evil Outsider (5), ITWF (6), Manyshot (6),
Feats (Artificer): Rapid Reload (1), Weapon Focus: Ranged (4)

Missed Feats: Quickdraw, Improved Critical: Slashing, Exotic Weapon Proficiency: Khopesh (swap to human or ditch power attack for quickdraw as low AB perhaps). FE: Construct is an end game choice for the new raids, in the meantime, FE: Undead is probably more useful. With significant gearing (GS HP item, exceptional constitution items etc) I'd consider swapping toughness for Quickdraw or another feat.

Enhancements (Artificer): Battle Engineer I (and prereqs, assuming no other PrE is offered), Damage boost III
Enhancements (Rogue): Mechanic I, Haste boost III, sneak attack and damage.
Enhancements (Ranger): Deepwood Sniper I, Favoured Damage
Enhancements (Halfling): Dexterity, sneak attack and damage, toughness AP

Equipment: Repeating crossbow, Great crossbow, Rune arm, Longbow (for manyshot), TWF'ing style (for single target DPS perhaps enchanted with elemental weapons, perhaps epic midnight greetings would be good choices).

Details:
UMD: 23 ranks + 3 charisma + 5 GS Conc-opp SP item + 4 GH + 2 GL + 3 Golden Cartouche + 3 epic spyglass +4 artificer = 47 (should be possible to have no-swap, no fail heal scrolls)

Artificer 7 / Rogue 7 / Ranger 6
Male Halfling - True Neutral
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LEVEL 1:
Race Selected: Male Halfling
Alignment Selected: True Neutral
Class Selected: Rogue (Rogue 1)
Abilities Raised: STR: 11, DEX: 17, CON: 14, INT: 17
Skills Ranks Raised: Balance +4 (4), Diplomacy +4 (4),
Disable Device +4 (4), Haggle +4 (4), Hide +4 (4),
Jump +3 (3), Move Silently +4 (4), Open Lock +4 (4),
Search +4 (4), Spot +4 (4), Tumble +1 (1), UMD +4 (4)
Feats Selected: Point Blank Shot
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LEVEL 2:
Class Selected: Ranger (Ranger 1 / Rogue 1)
Skills Ranks Raised: Concentration +5 (5), Hide +1 (5),
Move Silently +1 (5), Search +1 (5), Spot +1 (5)
Feats Selected: Favored Enemy (Construct)
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LEVEL 3:
Class Selected: Ranger (Ranger 2 / Rogue 1)
Skills Ranks Raised: Concentration +1 (6), Hide +1 (6),
Jump +2 (5), Move Silently +1 (6), Search +1 (6), Spot +1 (6),
UMD +1 (5)
Feats Selected: Toughness
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LEVEL 4:
Class Selected: Ranger (Ranger 3 / Rogue 1)
Abilities Raised: INT: 18
Skills Ranks Raised: Concentration +1 (7), Disable Device +3 (7),
Move Silently +1 (7), Search +1 (7), Spot +1 (7)
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LEVEL 5:
Class Selected: Ranger (Ranger 4 / Rogue 1)
Skills Ranks Raised: Concentration +1 ( 8 ), Disable Device +1 ( 8 ),
Hide +2 ( 8 ), Jump +2 (7), Move Silently +1 ( 8 ), Search +1 ( 8 ),
Spot +1 ( 8 )
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LEVEL 6:
Class Selected: Ranger (Ranger 5 / Rogue 1)
Skills Ranks Raised: Concentration +1 (9), Disable Device +1 (9),
Hide +1 (9), Jump +1 ( 8 ), Move Silently +1 (9), Search +1 (9),
Spot +1 (9), UMD +1 (6)
Feats Selected: Precise Shot, Favored Enemy (Evil Outsider)
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LEVEL 7:
Class Selected: Ranger (Ranger 6 / Rogue 1)
Skills Ranks Raised: Concentration +1 (10),
Disable Device +1 (10), Hide +1 (10), Jump +1 (9),
Move Silently +1 (10), Search +1 (10), Spot +1 (10), UMD +1 (7)
Tomes Applied: STR: +2, DEX: +2, CON: +2, INT: +2,
WIS: +2, CHA: +2
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LEVEL 8:
Class Selected: Artificer (Ranger 6 / Artificer 1 / Rogue 1)
Abilities Raised: INT: 21
Skills Ranks Raised: Concentration +1 (11),
Disable Device +1 (11), Open Lock +2 (6), Search +1 (11), UMD +4 (11)
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LEVEL 9:
Class Selected: Artificer (Ranger 6 / Artificer 2 / Rogue 1)
Skills Ranks Raised: Concentration +1 (12),
Disable Device +1 (12), Haggle +1 (5), Open Lock +4 (10),
Search +1 (12), UMD +1 (12)
Feats Selected: Quick Draw
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LEVEL 10:
Class Selected: Rogue (Ranger 6 / Artificer 2 / Rogue 2)
Skills Ranks Raised: Diplomacy +6 (10), Disable Device +1 (13),
Jump +1 (10), Move Silently +3 (13), Search +1 (13), UMD +1 (13)
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LEVEL 11:
Class Selected: Artificer (Ranger 6 / Artificer 3 / Rogue 2)
Skills Ranks Raised: Concentration +2 (14),
Disable Device +1 (14), Search +1 (14), Spot +4 (14), UMD +1 (14)
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LEVEL 12:
Class Selected: Artificer (Ranger 6 / Artificer 4 / Rogue 2)
Abilities Raised: INT: 22
Skills Ranks Raised: Concentration +1 (15),
Disable Device +1 (15), Haggle +5 (10), Search +1 (15),
Spot +1 (15), UMD +1 (15)
Feats Selected: Improved Critical (Ranged),
Weapon Focus (Ranged)
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LEVEL 13:
Class Selected: Artificer (Ranger 6 / Artificer 5 / Rogue 2)
Skills Ranks Raised: Concentration +1 (16),
Disable Device +1 (16), Haggle +5 (15), Search +1 (16),
Spot +1 (16), UMD +1 (16)
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LEVEL 14:
Class Selected: Artificer (Artificer 6 / Ranger 6 / Rogue 2)
Skills Ranks Raised: Concentration +1 (17),
Disable Device +1 (17), Haggle +2 (17), Open Lock +3 (13),
Search +1 (17), Spot +1 (17), UMD +1 (17)
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LEVEL 15:
Class Selected: Rogue (Artificer 6 / Ranger 6 / Rogue 3)
Skills Ranks Raised: Balance +1 (5), Diplomacy +8 (18),
Disable Device +1 (18), Move Silently +2 (15), Search +1 (18),
UMD +1 (18)
Feats Selected: Improved Precise Shot
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LEVEL 16:
Class Selected: Rogue (Artificer 6 / Ranger 6 / Rogue 4)
Abilities Raised: INT: 23
Skills Ranks Raised: Balance +5 (10), Diplomacy +1 (19),
Disable Device +1 (19), Move Silently +4 (19), Open Lock +1 (14),
Search +1 (19), UMD +1 (19)
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LEVEL 17:
Class Selected: Rogue (Artificer 6 / Ranger 6 / Rogue 5)
Skills Ranks Raised: Diplomacy +1 (20), Disable Device +1 (20),
Haggle +3 (20), Hide +2 (12), Move Silently +1 (20),
Open Lock +1 (15), Search +1 (20), Spot +3 (20), UMD +1 (20)
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LEVEL 18:
Class Selected: Rogue (Artificer 6 / Ranger 6 / Rogue 6)
Skills Ranks Raised: Diplomacy +1 (21), Disable Device +1 (21),
Haggle +1 (21), Hide +7 (19), Move Silently +1 (21),
Search +1 (21), Spot +1 (21), UMD +1 (21)
Feats Selected: Greater Two Weapon Fighting
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LEVEL 19:
Class Selected: Artificer (Artificer 7 / Ranger 6 / Rogue 6)
Skills Ranks Raised: Concentration +5 (22),
Disable Device +1 (22), Haggle +1 (22), Search +1 (22),
Spot +1 (22), UMD +1 (22)
Enhancements Selected: Improved Disable Device I,
Improved Open Lock I, Rogue Improved Trap Sense I,
Rogue Skill Boost I, Rogue Fire Trap Lore I, Improved Hide I,
Improved Move Silently I, Improved Spot I, Artificer Crossbow Damage I,
Artificer Damage Boost I, Artificer Crossbow Attack I,
Artificer Damage Boost II, Improved Disable Device II,
Improved Move Silently II, Improved Hide II, Improved Open Lock II,
Improved Spot II, Rogue Skill Boost II, Artificer Battle Engineer I,
Rogue Mechanic I, Ranger Deepwood Sniper I
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LEVEL 20:
Class Selected: Rogue (Artificer 7 / Rogue 7 / Ranger 6)
Abilities Raised: INT: 24
Skills Ranks Raised: Concentration +1 (23),
Diplomacy +2 (23), Disable Device +1 (23), Haggle +1 (23),
Hide +4 (23), Move Silently +2 (23), Search +1 (23),
Spot +1 (23), UMD +1 (23)
Favor Bonus Granted: Draconic Vitality (15 Agents of Argonnessen Favor)
Enhancements Selected: Racial Toughness I, Artificer Wand and Scroll Mastery I,
Artificer Crossbow Damage II, Rogue Sneak Attack Training I,
Ranger Favored Damage I, Ranger Favored Damage II,
Rogue Sneak Attack Training II, Rogue Haste Boost I,
Rogue Haste Boost II, Rogue Haste Boost III, Artificer Intelligence I,
Artificer Intelligence II, Rogue Sneak Attack Training III,
Halfling Cunning I, Halfling Guile I, Halfling Cunning II,
Halfling Guile II, Halfling Cunning III, Halfling Guile III,
Ranger Sprint Boost I, Racial Toughness II, Artificer Damage Boost III,
Improved Use Magic Device I, Improved Use Magic Device II,
Halfling Heros Companion I, Rogue Sneak Attack Accuracy I
Stats at End of Level 20:
HP:274 SP:330 AC:15 FORT:13 REFL:17 WILL:10 BAB:+16/+16/+21/+26
STR:13(+1) DEX:19(+4) CON:16(+3) INT:26(+8 ) WIS:10(0) CHA:10(0)
Balance:14, Bluff:0, Concentration:26, Diplomacy:23,
Disable Device:35, Haggle:23, Heal:0, Hide:34, Intimidate:0,
Jump:11, Listen:0, Move Silently:30, Open Lock:23,
Perform: n/a, Repair:10, Search:33, Spot:28, Swim:1, Tumble:5, UMD:25