Well there are a ton of different things you can do here. 5 def = Not very useful at higher levels 20 def = It's okay for the prayer bonuses, but when it comes up to it, rune pures usually prevail. 45 defense = Pking usually gets interesting around here, going into the low 100's and all. 70 def = Usually the pro's like I Kasoy I do this. It's useful for the barrows (Usually dharokers) To pk. Seeing as the new update, Bounty Hunter being released, i'd go with a rune pure.