I am quite sure that some of the harder fights in this game are for when you are lvl 5 or higher.
But anyway as others have said before me scout, be sneaky, use jump, crouch and push enemies of a cliff if you can.
I don't see my party as heroes, heroes die young. Use every tool at your disposal.. finding them can some times be a bit tricky, as best position for your archer/mage (high ground), sneaking and backstabbing, use potions and scrolls.
Anything that gives you an edge
This little fella here just got shoved down into oblivion, hence one less goblin in the next fight