Hello
About the anti-paladin it DOES get spells (spellbook) based on wis ... but only starting lvl 4.
And about your build, if you think you should go anti-P instead of dragon devotee, why not take black guard Prc instead ? it got full BAB, cha to saves, and better spell selection than anti-p AND gets its spells starting lvl 1.
you can also check Talon of tiamat prc (require Dragon thrall feat) wich got 3/4 bab but great dragon breaths used every 1d4 rounds ... like every 24s at most !!
if you're using one of those races: ": Aberration, Dragon, Monstrous Humanoid, Outsider, Fey, Giant, or Elemental. " you can check soul eater.