Combining templates on a soon to be pc-undead hunter campiagn

[Sir ThornCrest]

I am making up the characters for the Undead Hunter campaign. 1 player wants to play a ultra good guy Cleric (with domain in good & healing) so I was thinking of some or all of the following. he will be about 10th to 12th level, I wanted to add 1/2 celestial package, saint template and vow of poverty. Is this even possible? This package really would make him the ultimate good guy..but what would be the ultimate conclusion of this combo.

Thorncrest

 

[kenobi65]

This sure feels like a candidate for moving to the "D&D Rules" forum, the home for character design questions.