Lunia: Record of Lunia War/Eir

Eir Peltrow is a character and character type in Lunia. She's the healer, and appropriately can heal without potions. Even though she's primarily a healer, she can also do some offensive.

Pros

 * She's able to heal without potions, thus with enough HP she becomes very durable.
 * Most of her skills have low cooldown time.
 * Her offensive skills tend to cost her little Mana.

Cons

 * Her offensive power is relatively weak. Even though she can attack with skills often, they alone do minor damage.
 * Some her skills home in on enemies, and consequentially their trajectories are sometimes unpredictable and their damage total are often not optimal.
 * She can hardly cancel anything. The only cancel she can do is to cancel normal attacks into dash.
 * Her healing spells are often expensive and take a lot of time to fire.

Heal
Eir heals herself after a LONG waiting time. While she does heal a lot, this is often slow, so this is often usable only when the field is clear.
 * Verdict: Recommended against.

Light of Healing
Eir does small area healing 3 times. She can cancel this healing anytime by dashing, so in case of emergency, you can heal twice then run away before you get hit. This will be your main healing spell, whatever build of Eir you use.
 * Verdict: USE IT.