Didn't know dracotail were hit, but I think they can still work. Most of the main deck monsters share the same effect when used as fusion material, so could use king of the swamp and polymerization to fill the slots opened up. I play them with the dragon maids in a casual version of the deck.

Dracotail. Not too hard to pilot. Easy fusions with a trap game plan. Plus it has Faimena who is really pretty.