This isn't necessarily a new troop, but it would add an interesting twist to the way Wizards attack.
3 different types of attacks to toggle
1. Fireball: High damage, single target.
2. Lightning: Medium damage, splash damage
3. Ice: Low damage, single target, freezes defenses for .5 seconds.
You can only carry one type into battle with you, and choose which ones go into CCS and War CCS.
This would change the way people perform Major attacks such as GoWiPe and GoWiWi.
I like the idea of giving wizards a different style and I know a lot of people are opposed to heroes but using that concept on a defensive only hero could be awesome! Being able to set is defensive attack could be game changing.