I've refined the balance; now, a Priest, Bard, or Warlock can defeat a Mana player. I did this intentionally so that players focusing on Mana don't get too complacent. Ultimately, Mana is still beneficial to the city because the player needs to defeat Mana units for survival and also needs to play more actively to avoid being defeated. Initially, I wanted only the Priest and Bard to be effective against Mana, but that would have been too advantageous for the Mana player.