The short version (i.e. for someone who knows ToME 4 already): I think it's a great idea to use a variety of resource types as one of the main differentiating factors among classes. For instance, I mostly play mages, and I think it's awesome that I don't just get the generic mage, the healing mage, the debuffing mage, and the field control mage; I get all those, PLUS the addition of Mana, Positive/Negative Energy, Vim, and Paradox, respectively. It really makes the classes feel more unique
