You can farm zombies in graveyard with spells. Done it many times. Prob easiest way to get clades for mages. harder mobs are not easy though. Pve has always been a struggle for mages. Well so is pvp to be honest. Mages cant solo anything except other mages.
Taming and crafting are not combat activities. You dont get clades for mining, or wood chopping or fishing or gathering either.