Templars are easy to grind with, I somtimes just prefer it over running around and questing.

Galdiator is even easier.

I here Chanters are easy as well...

My Sorc who is almost lvl 18 sucks to grind on. Sure it hits hella hard and i dont even have mana issues. Just takes alot more effort with good chances of an early demise if your get sloppy. I can see this as a fun group class though.