Power Siphon Avg +Dmg

I am wondering what the damage buff from Kinetic Melee averages out to at very high levels of recharge. I'm not even sure how to approach calculating this one, so I thought I'd ask around here.

I keep hearing that KM is better on Stalkers than Scrappers, but if Power Siphon averages a higher damage buff than the high-frequency Build Up on Stalkers, I don't want to waste my time.

The most you're likely to get it down to at the peak is 30 second recharge, which is virtually "Perma". The power ramps up for 10/s, stays peaked for 10/s, then ramps down for 10/s after it's 20/s duration expires. This becomes an average of (assuming 156% peak is reached) 104%. To compare, the last time I'd checked my KM had it down to 36 seconds, which is an average of 86.67% Damage Bonus.

The rumor mill says its better on Stalkers because Power Siphon is hugely difficult to maintain constantly to get that higher damage bonus. Where-as Stalkers get Hide-Bonuses, plus burst shots of 100% out of Build Up without having to ramp. If I recall correctly, though, Build Up average to 30/s recharge is like having a 30% damage buff over that 30/s duration. So it's whether you want instant burst, or continuous boom that takes some work.

Thanks, JP.

Apparently there was a change recently in some patch notes somewhere that made Concentrated Strike autocrit from Hide for Stalkers, which recharges Build Up instantly. You can now get a double built-up AS, or a double built-up autocrit Burst, or just keep a more consistent build up effect by using placate>CS. I am trying to decide whether all of that truly makes a big enough difference.