What Mega Audino needs is Recover and Moonblast. It's workable without Regenerator, because you can stay unevolved during the early parts of the battle. Its problem is that it gets worn down too easily, only has Wish for recovery, and is far too passive. It only has Hyper Voice and Dazzling Gleam backed by a measly base 80 Special Attack stat.
Mega Audino works best on balanced teams that have a lot of pivots, or stall teams with multiple Wishpassers. It can pivot and pass wishes at the same time (switch in to wall something > use wish > opponent brings in a check > switch out to something that walls the check), but has no way to heal itself while doing so, and needs support.
What could potentially save Audino is a buff to Healer; if it were to function like an auto Heal Bell, maybe with a 50% activation rate, it'd allow Audino to provide status management for a team without momentum loss.
