Helping Strangers

So, I was out farming yesterday, was starting to get a bit board when some guy asked for help killing lichs for paper. So I think, oh why not......I should have thought more. Took on a lich was doing pretty good. He was down to about 1/3 of his hp and I was down to about 740 (about 2/3 of my hp), when his buddy lich comes by. But instead of attacking me directly he cast tornado (for 756). I die, get a raise and low 940 exp. Sigh. I should know better by now. oh i forgot to mention the guy ran away after i got hit for like 250.