So after playing this I think I have a rough guess on the general 3 decks:
Devious Devils - Arguebly the most busted base deck. Succ and Devil card asides, the Imps are the only Hoard type card, and upgrading them turns them into monsters. But the Hellhoud card is even worse since if you upgrade them enough, they can wipe the Enemy base on their own.
I barely used the spells and tower, the Units on this pretty much carried the game due to how cheap they are, even if they have lower hp, the raw dmg potential is amazing.
Queens Royal Guard - A pretty good deck overal. You dont have towers, the spells are okay, but the Units are suprisibly good and reliable. The Orc+Rogue or Archer + Battle Ram are usually enough from my experience but their all pretty, since you need to wait for your energy torecover to summon more. Honeslty a pretty balanced deck.
Wild West Wranglers - Ill be honest, I havent played with this one much and will likely edit this after i try them out abit more, but they dont feel fun to play. The units are average and dont seem to have anything of note, the cost is abit to much and they feel weaker compared to the other 2 decks. Fighting agaisnt DD or QRG isnt an uphill battle but it feels tedious.