For an support, high defence cleric, I would go for all END.
You've built yours as a hybrid, with good critical and a some-what balanced STR and END, so as the person above me has suggested, it would be good to get END gears because the higher you go in terms of levels, the more you will party (from my experience anyway) and as you will be healing (I hope you will) your party members, END will give you the ability to withstand hits better. STR plays its part only when you are bashing and not healing, which is rare.
+9 weapons isn't a must-have unless you plan on soloing a lot, and only buy them if you have the money. I personally think that partying is better for a cleric, but it's up to you how you want to play the game.
