Komala is another Gimmick Pokémon whose primary benefit of the Gimmick (Status Immunity) is outdone by others. Garganacl's Purifying Salt outright blows Komala's Comatose out of the water. So that leaves Komala with a small niche as the best Sleep Talk Abuser in the game. From randomized Normalium Z Sleep Talk, to Choice Band Last Resort Sleep Talk, to Sleep Talk Whirlwind strats, if there's a Sleep Talk strategy, Komala can most likely abuse it.
However, without Return and Last Resort, Komala, like most normal types is in dire need of a good STAB especially considering how milequetost Normal is offensively to begin with.
Item: Choice Band
EVs: 4 HP / 252 Atk / 252 Spe
Nature: Jolly (+Speed, -SAtk)
Tera Type: Normal/Fairy
While not as potent as Choice Band Last Resort, Komala being able to use Sleep Talk with a Choice Band makes it a very unpredictable attacker that isn't simply forced out because a pivot switched into its Choiced move. However, that's where the good ends on this gimmick. Sleep Talk is incredibly unreliable, leaving Komala from reliably beating opponents even if it has the correct coverage. Body Slam is the most reliable Normal STAB, and the paralysis rider is nice. Earthquake and Play Rough form the fabled Fairy Ground combination, providing near unresisted coverage.
Tera Normal to make Body Slam painful and Tera Fairy for protection vs Fighting and a boost to Play Rough.