Don't answer lazy posters, report them instead please.
Originally Posted by theoriginalmre
Quick question concerning Haste gems for Mut:
There comes a point when building up your gear when the spreadsheets show it's best to have [AP] gems and [AP+Haste]. But when you have enough high-level gear, the spreadsheet starts to show that it's better to have [Haste] gems instead of [AP+Haste].
What is the reasoning behind this? At what point in the stats does [Haste] > [AP+Haste], and why doesn't it happen sooner?
As with all stats, increasing one of them, makes all the others more valuable. This is explained in detail elsewhere.
At low gear-lvls, Haste isn't all that powerful, because your Poisons are rather weak due to relatively low amounts of Hit, AP and Crit. As your gear level rises, Haste increases in value and eventually becomes the favored stat for most Mutilate Rogues when you're near BiS on all slots. I suspect Haste becomes so valuable because of the increased amount of Poison proc's, both with and without Envenom buff.
Over time though, as your Haste increases, AP and Haste will fight for the top spot as the best stat to choose. At this point it's a matter of personal preference. I prefer to focus on Haste since this gives me an edge when switching targets in fights like Putricide and Lich King in terms of build-up time before reaching the 5xDP stack.