Roalesk is definetely bad because the moment I could cast him I would like to win already, too heavy. The deck relies heavily on speed and doesnt't have draw besides from Kumena and
Silvergill Adept and I believe
Supreme Verdict is most likely dead end.
Hadana's Climb is pretty good, it might be good finisher and it should flip very quickly, I'll give it a thought. I played Hadana's in standard ixalan merfolks and UG elves and it was quite good, especially in elves because it was the only evasion I could get.