Sorry I didn't get back to you sooner Monk, saw your PM today, was offline all weekend >_<.
SN gave you good advice, the same I would've gone with actually. However, having been off the game for several months now (just log in for the Vet Badges really...missed the Halloween event '/e cry') so I haven't actually played in quite a while to be able to possibly offer you more insight than what SN has already said.
Picking up Hasten alone and slotting it as listed on the Wiki will give you a huge improvement. Example from my main Tank is to slow down with the attacks. Being a Tank I just need to hold aggro, not dish out a ton of damage.....but I solo a lot and want to move fast through the mobs. So I'm slotted outright with Endo reducers and Acc above all else, then of course Recharges and Damages...whatever I can get from Set Bonuses as well. You on the other hand are a Damage Dealer, so I can see the need for all this. Get Hasten and just try to space out your Attacks, if you can stand to take a little extra damage by not attacking as fast, that will benefit you for Endo Regen.