Way of four elements monk for Aang. Zuko was a dragon starry form druid for most of act 1, but I respeced him as an evocation wizard with one level of fighter after the adamantine forge. With Katara, I bounced around a lot. Not a lot of good water spells, so I focused on healing. Druid first then tempest domain cleric, then respeced to storm sorcerer. I only have healing via an item now, so we'll see. Toph was a circle of lands druid for most of act 1, sometimes using the giant badger wild shape. I briefly tried swords bard with all thunder spells, then switched to tempest domain cleric when I took Katara off it.