Azael
Magister
ARAM still has a decently sized player pool, the queues are not very long at least. Dominions must be a massive failure, I don't think hardly anyone plays that mode regularly. No idea how TT fares, probably as "well" as it did before it's rework. SR will always be the main thing as long as that's the competitive mode. Maybe if there were ranked solo queue for the other modes they'd do better, or maybe that would just be a pointless waste of resources.