maybe something like -1 max MP every time you level up or -25% to max resistances
While I agree changing rock heart to be an item that isn't transmuter specific is a great idea, I don't think either of those will work.
Beyond that, I do
think the Transmuter remains a problem. He can still go deeper into the Gaan-Telet then anything other class even without this thing.
And on the topic of no brainer items, I think the Troll Heart and Martyr Wraps are both still woefully underpowered.
Totally in agreement, though Martyr Wraps stand the risk of becoming a monk-specific item (though with the Trisword nerf that class desperately
needs something to combo off of).