Currently the gameplay depends exclusively on potions or team to become sustainable. No matter the class, if you spend some time in combat at one time or another you will have to use a potion of energy or life, this is because the statuses where you can increase your life or Energy only increases the amount and not the regeneration of it, that is, while you are in combat your life or energy does not regenerate, except through skill (heal) or potion. This makes the GameTired of having to fight several times for lack of sustainability.
Some regeneration items would be nice like they do on ch. id always be low energy as a shadow warrior could never use my stealth + deft strike combo in group farming/ levelling cause always get low energy way too quick.