LA + Static Blows --> how much damage do I need...?

to effectively shockstack big hp stuff (golems etc) in 70/71+ maps?
Obviously for more than half a second so I would have at the very least 1 shock stack up on mobs all the time, ideally 2-3.

I am currently not specced into static blows because my bow kinda sucks and I only do 61-371 lightning damage with my LA.

But even with a very good ele bow, how much hp do the tough guys have on higher maps?

If anyone did the math to that or could just tell by experience I would be glad to know which amount of damage I`m aiming at for gg gear.