Which faction is the most interesting to play as, and what strategy do you find most engaging?

The sworn enemy and a barrage of arrows have a real effect only when upgraded towards Chaos. 3 (if you manage to get machines, then 5) Magic Defense (Spell Resistance, Offense Resistance) per turn will inflict significant damage even with weak elven magic. He should have enough mana for everything. Moreover, in 3.0, the elf doesn't spend a turn recharging his arrows. At the beginning of the battle - Magic Defense, and then Spell Resistance or Offense Resistance.