I am really fond of interesting strategic combinations and tactics in this game.
One that comes to my mind is Wilbur and Evelyn. They go great together as you deal serious amount of shared damage, then dispel with eve and remove the damage sharing buff from enemies to kill them one by one with tile damage. Usually two heroes remain standing and you just watch them die holding hands together.
But some heroes are not so apparent with their use, they are usually underrated because their synergy is somewhat niche, like gadeirus. Him, evelyn and elena go great together. Eve heals gadeirus so he can stand alive until full mana and heals and attack-buffs elena until she gets to fire her special.
Any more enjoyable synergies regarding overlooked heroes?