My tough choice was between Aurodragon and Wraithcaptain. However, I had Revenarchion already so now with Auro I basically never lose… just get an army of Reven 
I have Auro, Sub, and Motoshark on one account and that made it pretty easy get to 152. On the other account even with Moto, Rexo, and Coalknight I keep running into teams that counter perfectly and I can’t get past 119. My favorite is running into a never ending line of buffed Doomengines.
Sounds like you don’t have much to support your legendaries. Any duplicating monster the enemy team has doesn’t keep the buff… only the initial monster is buffed. That said, Doomengine very annoying to deal with.
Ya I have 3 star protectors and some 4 star GT but chronokiller and assassinate seem to be on every team this account encounters lol. One more draft before the event ends, maybe that’ll make the magic. Good to know about duplicate buffs tho!
very bad luck in all draft!!! only advanced to 191.