Guild Wars 2

Anyone know how much increased damage output we get from might stacking?

I tried this last night and it seemed to do ok using S/D

Got skill grant 3 stacks of might when using a cantrip
Got the utility skill for gain a buff on attunement swap
Took the increased buff duration for the weapon sigils (or is it increase boon duration)

Full pts in lighting to get the +50% increase dmg to knockdowned , increase damage when in air, and increase damage to enemies with low health
Enough pts in arcane to get the reduced cool down on attunement swap
Signet of earth to immobilize

I forget the runes, but i used 3 different ones, 2 of each set. Focused on increase power, increased buff duration, and increase knockdown time.

So is this build any good for DPS glass cannon spec ele or no? Its lacking a bit in defensive traits, stun breaks and auras. I could use the utility skills for defense but then i lose the combo finishers.

I was trying to make something that had such high burst damage it would kill anything before it kills me.