New Creep type: Gypsies
We have priests, angels, cats, giants, and of course summons and idols....
In all these minion types theres none that affect mana. I think it would be good to have a creep type called "Gypsies" (or whatever) that work the same as monks, but instead of healing they regen mana.
Also, perhaps a minion type that does no damage, but drains mana..... The mana drain minion could be a 4th category of idols,maybe a "Black widow" spider or some such...