Ideas for the Engineer

Bombs/grenades

Builds blockers i.e. walls

builds mechanical mounts

builds clockworks soldiers

Can improve other units weaponry/armour

has an extendible spanner

Builds 5 keys for 5 units that when combined creates Megapixellatoriser

Ideas for Druids

Summons beasts

Manipulates vegetation

Leaves of death -- wind spell that propels autumn-like leaves at soldiers

Summons insects

Grows barriers

Sacrifices another toon for temporary power boost.

Shapeshifts

creates potions

drops menhirs on enemies