i like it.... but would make these changes:
Succubus 1/Sorcerer (Metamagic Specialist) 1
Succubus 2/Sorcerer 2
Succubus 3/Sorcerer 3
Succubus 4/Sorcerer 4
Succubus 5/Sorcerer 5
Succubus 6/Sorcerer 6
Succubus 7/Abjurant Champion 1
Succubus 8/Incantatrix 1
Succubus 9/Abjurant Champion 2
Succubus 10/Incantatrix 2
Succubus 11/Abjurant Champion 3
Succubus 12/Abjurant Champion 4
Marshall 1/Incantatrix 3
Paladin 1/Incantatrix 4
Paladin 2/Incantatrix 5
Monk 1/Incantatrix 6
Marshall 2/Incantatrix 7
Marshall 3/Incantatrix 8
Warshaper 1/Incantatrix 9
Warshaper 2/Incantatrix 10
Lose 1 BAB from dropping fighter but gain a caster level, lose 1 BAB for monk:
18 BAB, CL 20.
CHA to Saves, Int and AC
get to use Cha for boost to
Dex and
Cha(marshal Auras: Motivate Dex, and Cha) and get a Major Aura.... pick a Draconic Aura(Vigor)... then take the feat: Dragon Touched(gives you Dragonblooded.. and your Vigor Aura will give
Fast Healing 4, also.... since you will be in some other form most of the time... get additional boost to Unarmed Combat(+1 Die size Unarmed Strike), immunity to Critical Hits & being Stunned, +4 Str and Con
if you took the feats:
Superior Unarmed Strike
Improved Natural Attack(unarmed Strike)
2d6 + 2 size boosts @ medium size for unarmed Strike