Try using simcraft, and if you can't figure out how to model what you want, ask in the simcraft thread, thanks!
I"m finally able to reach the 2589 haste for the extra tick on UA, but giving up a lot of crit to get there. With the movement in fights, are you guys finding better dps sitting at 1993 haste for the corruption extra tick and stopping haste.and stacking pure crit past that? Or should i go with the 2589 haste? I'm having trouble figuring it out with the mechanics involved?