Originally Posted by
Totaltotemic
To add to that (like the discussion going on in the "too much spirit?" thread), stacking Spirit without question is also a bad idea.
Some people may not be aware, but those of us that like to argue the mathematical differences aren't really likely to say "well, just do what you want because you're not good enough to use it anyways" because we all generally think of ourselves as good enough for these seemingly minute differences to matter. If you want to tell yourself that it's irrelevant what you choose, you should probably not be on a forum that is meant for discussion, because there's no discussion involved in a "do whatever you want" play style.
Specifically on topic though, even if haste and crit are "equal" in terms of what you get out of them (even if mathematically equal your benefits still manifest in different ways), there is still a right way to do each and a wrong way. For example, if you're going heavy crit, you probably don't need 13k Spirit and two mana trinkets at the same time. To use an opposing example, and one of the things we're discussing, Reglitch (and a few others) contest that a "haste build", if better that crit, means ignoring the ReM breakpoints and stacking pure haste; myself (and a few others) say that if haste is better, you should still only build for it by going to the breakpoints. The point is that we're trying to pin down the optimal haste build, the optimal crit build, and then comparing the two, but it's difficult when we can't even agree on what "optimal" is for either. There's still work to be done here, we are by no means at a consensus that they are equal or that the decision doesn't matter.