If the power is a Toggle, and auto or a "Psuedopet" (like Tar Patch or Liquefy) then the Boost will last for the duration of Power Build Up. If the power is a straight, long-duration buff like FF's allied shields then the buff will last for the duration of that power.
So Dispersion Bubble gets boosted for about 10 seconds (the duration of Power Build Up), but the two allied bubbles would get boosted for their entire 240 second duration.
Amongst other things it'll affect Defence, and Tohit Buffs. So Maneuvers and Tactics would be affected. It works very, very well when combined with "Vengence".
I originally went down the psychic road for my defenders epics, but i find myself looking enviously at the effects of Power Build Up from Power Mastery, how exactly will it effect my bubblers shields?
Are any shields applied within the powers duration at enhanced effect for the duration of the buff or the duration of build up? Also would i be able to trigger Dispersion Field just after and recieve and enhanced protection from it? Does it effect tactics/assault/maneuvers if so could you do the same as for dispersion field?
The pellet with the poisons in the Vessel with the Pessel, the Chalice from the Palace has the brew that is true...