the one cb lvl will be worth it. 52 prayer, even tho smite wont make them not protect item, it will eliminate their prayer so they can't do as well. And it will make it last all that much longer for you.
46 def is no biggy at all either. it is 1 def lvl, so no cb lvls gained, and it provides a little more protection
and if you're going to sell, get ahold of me.
thanks