The trick here is to not spoil what the bonus is for each set. Then people will wear all manner of sets as they manage to get them just to see what they do. However I too am slightly against class specific themes to equipment. I favor general benefit themes like and and over "general warrior" themes. Same for and over rogue and and over mage. That way it can benefit anyone. Set boni should be something more substantial than a simple numeral modifier though. More like this example: While wearing a mageish set of whatever gear, casting a spell of any sort costs one less. Or this example warriorish set boni: Every time you kill a monster, you get an invisible buff for 15 turns that boosts by 5 for ten turns and stacks to way past crazy. (If you kill enough fast enough, it gets easier to keep crazy boosts. I could keep spitting these out, but I think my point is made.