Death Structures

If anyone has any tips on tactics for playing the demonic branch - throw a couple my way, will you? ;)

Please:
Level up a high-speed assassin. Around level 15 with a pair of green crystals, he'll outpace devils under full tactics and move first. He throws a mass cancel, then the devils follow and chop down the enemy tactician (or other most dangerous hero). In other words, roughly speaking, behead the enemy army on the first turn.

Additionally, devils with Vampiric Touch are great at clearing Dragon Utopia and other powerful stacks of black/mega dragons/other high-resistance creatures.