Level 10 spells or higher BAB?

So for context currently playing through the game and have come to a sort of crossroads. Currently playing a Cleric-Crusader Angel and just finished the final Legend path quest. I'm planning on going paladin tortured crusader because it scales well with Wisdom, but I've also heard that Angel level 10 spells are pretty good?

Would it be better then to do 20 Levels in cleric crusader > 10 Loremaster > 10 paladin or just a full 20 cleric > 20 paladin? Since the main difference I see is in the BAB.