Abjurant Champion Caster Level and Base Attack Bonus

[Grayson01]

A AC's BAB is equal to their CL, there are countless ways to boost CL beyond Character level would a 15th level Sorc/AC with an adjusted CL of 18 have a 18 BAB as well or only 15th?

[KillianHawkeye]

Um.... Abjurant Champion allows you to use your BAB as your caster level (the author's assumption that the class would be taken by a warrior-type with just enough casting to qualify rather than what actually happens, a caster-type with just enough BAB to qualify). It does not allow you to use your caster level as your BAB.

[Biffoniacus_Furiou]

You've got it backwards. Your caster level is equal to your BAB, boosting your BAB will increase your caster level, but boosting your caster level won't change your BAB.

[Grayson01]

Oh duh, that is why I would not read books at 3 am lol.

[Douglas]

A AC's BAB is equal to their CL, there are countless ways to boost CL beyond Character level would a 15th level Sorc/AC with an adjusted CL of 18 have a 18 BAB as well or only 15th?
The ability in question takes BAB as an input and affects CL. It does not go the other direction.

Edit: Took too long reading other tabs.