[@Lord Santa] Well I was more talking one on one, a few people against one won't bode well for that one man, no matter who he is.

And water is magic, which mords resist highly, but I don't know how they would resist water? So unless it's a lvl 5 spell it wouldn't phase them I would think. 

My suggestion is- They're probably slow because they're so large and in armor so tire them out then beat then beat them up. Or outsmart them. Or have them fall off a cliff. All valid ideas.