Thanks for the replies, I think with the art style of elemental and the elemental nature of the lore and universe that a Druid hero would fit perfectly.
I was thinking the Druid can have a few lines of specialization to go down as per some of the other heroes
1. Shapeshifting abilities to make the Druid a powerhouse in melee
2. Elemental and Animal Summoning abilities to supplement armies
3. Elemental and Nature based spells, both strategic and tactical. Spells like entangle to hold enemies in place, or fissure that enemies can perhaps fall into. I would separate out some mage spells that are more elemental in nature. Transmute land perhaps to change forest into desert, cause a blizzard to blind and disorient enemies that wander into your territory or summon a wall of vines.
Remember Creeping Doom from D&D? That would be a kick ass strategic spell to use on a few tiles or a city.
4. Healing and buffing abilities that build on the Life tree and have AOE - No priest/cleric hero so this perhaps can cover some of that.
Basically keep talking hopefully Kael is listening to us. I didn't want to constrain things too much, open ended, non defensive discussions are more conducive to a good customer centric outcome! Jesus I've spend too long in the business world.