FP Training past level 200.

Absolutely. Mist Eruption can utilize up to 5 stacked dots to multiply its damage considerably. At this point, if you're only training with Paralyze + Mist + Eruption, you're severely under-utilizing your F/P. I've not tried future perion yet but I suggest to always stack 5 dots before exploding if you cannot kill a monster in a few hits.

My thought's behind not using all the DOT skills because that takes a while to cast them all, where as I can use mist eruption every 5 seconds, wouldn't that add up to more DPS then stacking DOT skills on mobs? If I have to do that I would be killing at an even slower rate which isn't good for training with a party. Solo it might be viable, but who wants to do that until level 250?