This is what my friend has, ITS OWNAGE, Not like a regular 1 def melee pure, but With rune pures you can be lvl 90 with some INCREDIBLE Attack and Str, plus Pray etc.
My rating on Rune pures (only Because they own me) is 9/10
Id say... keep defence 1... When u get 60 atk 60+str 40/45 def... ur hp is around 55-60 and ur over 63cb...
So that means if someone hits on their spec ur k0ed... unless ur a huge safer ;D