Hmm, Would also be cool if you could make set bonus, like if you got 4 pieces (example helmet, armor, legs, boots) you get some bonus like lets say set 1 for sorcerer "4 Pieces Bonus : Increased Mana Regeneration by 50%" and then if you got like example: Amulet, Helmet, Ring, Boots, Legs, Armor you get the 4 pieces bonus and the 6 pieces bonus "6 Pieces Bonus: Increase Maximum mana by 300 and grants you a new ability that you can only use if you got this set on."
If you got the 6 pieces on you get a cool spell, example "Fire Blast", A fire single target spell that does 30% more damage than Exori Flam and hits 2 times use and costs like 60 mana."
And then maybe some druid set that will be hard to fix that provides them a spell "Conjure Regeneration Rune", a rune that you only can conjure when you got the 6 pieces bonus set on, when you use it your health and mana goes up by 1%/second for 5min/charge.
Would be useful and many people would buy. Though should be some limit on how many runes u can conjure daily , also high lvl req on set or spell so people dont abuse and bot up those runes.
But regarding your post,
Maybe
Set 1 -
Sorc: Flame Set/Chaotic Set
Druid : Heretic Set
Knight : Guardian Set
Paladin: Bullseye Set
etc. ^^