Yes, i am using three fusion engines here and all of them can be used in the same turn if you draw the right cards!
Dragonmaid: They have some dragon support cards and a very nice fusion boss monster: Dragonmaid Sheou.
Branded Fusion engine: they fusion from the deck and them fusion again to summon some broken monster that shouldn't be here, in this case Dragoon. The only issue is that you need get locked in fusion monsters.
Fusion Destiny: one card boss monster :v. Activate by last.
If you dont know how the Branded Fusion Combo works i have explained it in one of my last decklists.
GLHF