well Kie, ofcourse I have heal spells. my attack is so low I need heal often not to die.
warriors have heavy attack, so they kill the mobs before they die.
the thing is: pray in between battles to recover HP.
if you don't, your HP eventually will wear out yes.
Clerics need to do the same. If I continue fighting, my MP will wear out, and I will die too...
we all must pray. pray pray pray.
And there are nice heal stones. Just rare. I happen to have an angels blessing stone.
nice nice nice.
Point is. If you play right, you don't die. You just need to get rid of old habbits of using a trap to lay down all mobs around you in 1 blow.