Health is the second most important thing to get when creating a combative weapons based player. The more mana a player has, the more skills they can use in succession. Certain skills require more mana than other skills. Skills cannot be used without enough mana. Mana is the most important thing to get when creating a magical player.
All players start out with full energy.
As players move they lose energy very slowly. Their energy will regenerate slowly only while the player is resting. A player rests by standing still, or laying down. Laying down regenerates energy faster than standing does, but it also takes a while to recover. If a player runs out of energy they will move very slowly and can't jump because they are too tired.