Discussion of third-tier monsters.

If the ogres are 1-1-1-1-1, I would go with 4 genies in melee combat. I would first cast "Bless" on the genies, and then act according to the situation.

I've tried it, but genies have no chance.
Ogres also have "Blood Frenzy," "Serpent's Strike," and "Magic Resistance" in their spellbook.

Unless the opponent is really clueless, you can't win with genies.