Artificer+?
Factotum would get you extra actions, but is just about as feat hungry as Artificer,
Binder on the other hand can get you crafting feats from a Vestige (Astaroth), why specialize when you can have just the right feat when you need it?
you can now cover more than one archetype (Blastificer, Meleeficer, Buffificer, Archerficer and Hordeficer)
PS: What Other Gestalt Combination you find most appealing to you?
jeez, so many come to mind...
Kalashtar
Archivist20 /// FactotumX, thrallherd1, FactotumX have your thrall be an artificer (on days that you want one
)
Druid5, Planar Shepherd10, Druid5 /// Anything you want really, could be swordsage, cleric, ardent etc... (in this case I would self nerf and not pick a plane with insane time ratios)
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[spoiler]Venerable DW Loredrake Kobold, LA buy off Divine Minion Template, and as many Ghost levels as you can get,
Insane Bloodline Abuse ... 3 major bloodlines (BLA = 1st Bloodline, BLB = 2nd Bloodline, BLC = 3rd Bloodline)
"side"1
BLA1, BLB1, BLC1, BLA2, BLB2, BLC3, Thrallherd1, BLA3, BLB3, BLC3, Legacy Champion10(choose +8 to a bloodlines "this level counts for class level dependant calculations" <---me paraphrasing)
"side2" not in following order
Binder3, Ardent3(magic mantle), Dragonblood (cloistered) Cleric1, Dread Necromancer1(if rebuking stacks), CrusaderX, SwordsageX, WarbladeX, bard1(song of the white raven),
optional: rangerX, scoutX if you want to stack swift hunter
erudite, wilder if you feel you need double or triple pp for your ardent stuff (bloodlines will advance ML and PP but not powers known, but ardents are ... special)
what you get (maybe if your DM is freaking Bonkers...)
WS as 11th level druid at will, outsider type
ghost abilities(try to make your outsider or dragon type override the ghost type)
dragon type, access to epic feats and other cheese
EBL around 20th depending on how your DM rules "best progression" and if you put your binder levels between your BL/Legacy CHampion levels
ML around 20th for Ardent, see above
PP for around 20th as ardent, or 2X, or 3X if you took 1 level each of erudite, wilder
rebuking as around 20th or 40th level cleric depending on what your DM rules possibly 2 pools as 20th level
initiator level around 10th for crusader, warblade and swordsage
inspire courage as if you were around 30th level bard(song of the white raven stacks with "levels" of warblade/crusader)
pretty much max out the thrallherd table for number of believers(160sumthing), It would be something like 20th character level + 18th "level" thrallherd + cha bonus to determine leaderhship score
around 19th level for swift hunter calculations
there is more i'm sure if you dig around...
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EDIT: that probably didn't help at all
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it's late, so there are probably errors, and you could probably squeeze more in here