You should fix a problem with castermana. My guild killed fennin ro with only one tank and a few wizards nuking with manasong and clarity and modrods. It was sort of a long fight but we killed it. Now we can kill all mobs in game... Maybe you could fix so you cant get new mana if youre aggro i dont know.
I may be misunderstanding something but this does not look like a bug, this looks like feedback, very weak feedback at that, the kind of feedback that should be thrown into the pit of vague & weak trolls that are used to feed Rallos' war boars.