Quote Originally Posted by Deceptus View Post
If the essences / lost actions are a one time obtain (with a proper cd) then sure.

Having to farm mats to use essences is a major PITA. It also promotes hoarding because you don't want to use that awesome essence you got on a random mob because you don't know when you're going to get it again.
Or just buy them off the MB. That's what I do.