>In general transmuter spell cost is so high in group vs group
>fights they run out of juice long before the fight is over.
>They don't work all that well, specially at hero lvl using
>metabolic spell in pk is just wasting mana. In general vs 3-4
>people just to get them slowed down I have to cast it multiple
>times. Considering they are useful in extremely dangerous
>situations and how much mana it costs. I would like to see
>them work a lot more often.

I talked it over with Valg & Nep, and the hard part about these spells is balancing the "awesome gankiness" of something like mass metabolic slowing. I'll take a look at success rates, but I doubt that they will get much more than tweaked.