Usually for power levelling on this level range people go for the Ravenous Lava Lurkers besides the Oramond Minotaurs you mentioned.
There is also the Issavi Delta, West of the boat that you can try, it is similar to Oramond but with way stronger creatures and better Xp, you just need to go south and lure the creatures one on one, the RP should be always wearing an energy ring though, as even with magic shield that hunt is quite dangerous for mages, never let the creatures touch you.