Originally Posted by
CSJenova
I don't think you understand PPM as well as you think you do. Berserker IS a PPM based enchant, but it does not have a CD. Those 2 are not mutually exclusive and in the case of proc munching can actually end up being a bad thing. Something tells me your diagnosis of "with raid buffs it's almost always up for me lol" is not particularly accurate but you simply noticing it fairly regularly as extensive testing periods have been done to show it's average up time.
Having said that, you are correct that it will usually yield more effective AP than a flat 110 enchant, but some people sacrifice their marginal DPS loss to know that their DPS will be more consistent. As someone else said, some DPS calculators put the difference as low as 12dps...which can easily be thrown off by bad proc luck when you "need" it.