Originally Posted by
Proletariat
Problem with a regen stat such as Mp5, Spirit, and in our arguments, Intellect, is that it has no net benefit if you actually do not go oom. That is, extra mana doesn't help in situations where you aren't actually dependant on it.
What is more effective is really to keep multiple pieces of gear, so you can swap and juggle haste, SP, regen and tailor your stats to suit whichever boss you are focusing on. Gem your gear as appropriate, in consideration of whichever set you plan to keep it in (etc your Belt for regen will have an Int gem)