40 vs. 50 faith

I recognize that weapons don't scale much once you pass 40 STR/DEX, but what about miracles and faith? Do spells like greater lightning spear, Wraith of God, etc. scale well enough to be worth putting the extra 10 levels in faith over increasing another attribute?

Note that I do a lot of casting of those spells.

Faith scales pretty well from 40 to 50 and is worth taking there if you're using spells. The same is true with int up to 44 with logans, and 50 with TCC

With Darkmoon Talisman
40 Faith = 191 Adjust
50 Faith = 226 Adjust