If anyone else has noticed....
Shadow:
Turret: Undead (Howlitzer)
Healer: Fiend (Silkwing)
Elemental:
Turret: Construct (Gun Puppy)
Healer: Gremlin (Tenderfoot/Ironclaw/Darkfang Mender)
Piercing:
Turret: Slime (Polyp)
Healer: ???
I think there should be a beast healer. I had an idea that it could be a new type of chromalisk which spits a puddle of pink stuff which could heal any monsters in the puddle. Any monsters nearby might move into this puddle because they know they need healing. By every tier you could make it so the puddle can get bigger and heals more. I don't know what this monster could be called so if you support this, please leave a name if you can think of one :?
You can interpret that in different ways.
Silkwings are classified as fiends, but still fit into beast levels.
First off, Healers don't deal damage. What do turrets and that damage classification have to do here?
Onto defense, a beast healer would be weak to pierce, just like silkwings.
Menders are neutral to pierce... there's only one option left.
What resist pierce? constructs and slimes. Slimes are weak to shadow...so are menders.
Conclusion: Construct healers would be more unique.