gasher

I'm trying to work out a balance spec for this build that includes Stamina at 20 (6 slotted at 25) but the only way I can seem to do that is not taking hasten, and maybe an attack or two.
But I was thinking - how badly is hasten needed with this build? As far as groups go, were here to make the mobs easier to take down, with our firepower secondary. So far I havent been in a group that proved to be going quicker than my debuffs could recharge.
We dont get too many insanly long timers, and AM 6 slotted is perma, is it not? Even if its not, a gap in between does no harm.
I've never been a huge fan of hasten. The end drain at the end always seemed too big a drag for me. Spell timers are set for a reason - so we dont go from 100 end to 2 end in two attack cycles!
What are the downsides to not taking hasten at all with this build? (Besides the obvious longer attack timers...)

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<speaking about DP> As some may know in Beta I hated this power. Once we learned how to make it perma I loved it. It's an awsome power in it's perma state and NO build should be without it! It increases your max health by 40% and acts like a decent heal.

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I havent read all 8 pages of this thread, but I've searched the Tanker and Guide formums and havent found an answer.
How do you perma DP? Could someone please post specifics?