Quote Originally Posted by Heliomance View Post
You can meet the BAB +7 prereq at level 7 with a full BAB class O_o
And you may have been aiming for a powerful class, but I think you overshot. A wizard taking this class will end up Tier 0 or -1. It's sick.
But there are no full BAB class with knowledge history and knowledge the planes as class skills, if I'm right. And if you cross class you those, you'd still need to be at least 3 levels for it to get 6.

For the wizard, you'd have to sacrifice 3 levels to get the whole 10 levels, so you'd still be losing quite a bit of your level 9 spells. You'd be powerful, yes, but your overall versatility would drop, which is the point of tiers.