Can't upgrade Set items.

Pul runes may be worthwhile in the Armor, it would really depend on if the +Def from Griz armor is factored before %ED, (Like +max in a weapon is counted toward weapon total). I think it would count like that. A perfect (950) DEF Griz armor with 3x Pul would be 1805 DEF.

Edit: I don't think Shael's for a faster block rate would be effective at all, with the inherent 65% from the shield itself, and Holy Shield also gives a Block Rate boost.