Sylvan Elves versus Demons.

What neutral creatures are you talking about? Hit-and-run is a tactic where you strike once and then retreat. Let me explain again. Take a high-level Winged Horror (level 15+ is preferable), equip it with archers and druids (all of them!!!), and fill the remaining 5 slots with 1 archer each. Attack with full stacks, then use single units to buy time and retreat. Repeat this process n times. With Blessed Dungeon Points (BDP), you can successfully use the hit-and-run tactic with any hero. Max out the "Cursed" skill, take "Magic Arrow," "Rain," and "Ice Block" spells, and two Dryads. You'll definitely get at least one shot in. And considering that this hit-and-run tactic doesn't require many skills, you can attack earlier, when your opponent might not have adequate defenses (just be wary of demons with Chain Lightning and the "Unclean Word" spell).