RE: Nerf to unplayability all units with Destroy Target
Destroyless Unit changes (in general, no movesets):
Salamander/FireElemental - Meteor could work as a fiery non-destroy ability
Pyromancer/FireMage - Destroy Target could be replaced with a 7 turn "Fire" status that temporarily nulls and disables. This can apply to Salamander and FE as well. Be aware of Alchemist if you do this.
Archer/Ranger - This is probably the healthiest unit to keep destroy on (Ranger if it loses ortho-destroy), but if so it could be limited to twice a game or have a 10 turn cooldown. If not, make it a ranged thundermage because idk what else gives a good "bow and arrow" flavor. If nothing else, make it a ranged Poison.
Dryad - Honestly make saplings better morale storage and give it a move or attack ability, and remove the ability to transform. Dryad is a weak unit as is surprisingly.
Soulkeeper - Change soulkeep into [Pay 1]: (Unblockable) Swap places with enemy and transform them into ally Ghost.
Fireball - Change destroy target into attack only
Lilith/SoulFlare - I'm not sure how to change this, perhaps charm lasts until the unit attacks and then gets attacked (the attack is blocked in that case)?
Necromancer - Allow Necromancer to instead use death locations to create BonePiles. Oh and raise the pay for Lich and Necromancer's ability each by 1 or 2.
VoidMage - Make this lose Range 3 void, and have Void instead last 10 turns or until a enemy champion dies.
That would make Fireball stronger. As it is now, it kills itself; if it changes to Attack only, it does the same thing, but stays alive so that the opponent has to kill it.
...well, assuming that it doesn't also get "On Attack: kill self", but if it does, it is exactly the same (apart from where the fallen unit marker goes).
nuance