on my tank i was 70 range 1 def 50 att 60 str, then got 80 range and 40 def 60 att n strength, then 90 range and 52 prayer, then 70 defence, then i carried on with range training. If i was you i'd do it that way, if you get 70 defence any sooner you will regret it because of the rune pures your level.