Without HP washing, its useless.

Hmmm, so adding 1 point to hp each lv would have any significant change? like instead of 1700 hpo at lv 70 we would get like,umm 3000?

Well let's see

1 ap into hp = about 20 hp, right?

So 20-70 is 50 AP

50*20=1000

So 1 ap into hp for 50 levels is 1000 extra hp. If you do it up to 120 you'll have 2000 extra HP.

By the way, this is how I think ranged classes were intended to be designed, but when HP washing came about that all changed.