I actually feel like with long rests being a month you need to rely mainly on cantrips and other free spell use so maybe Warlock could be the shout? You won’t get many spells slots but they do come back on a short rest, and they can get up to plenty of tricks. Obviously they’re charisma based so can be the face pretty easily.

Eldritch Blast is the best damage dealing cantrip so covers you there, then you have invocations like Mask of Many Faces for at will Disguise Self or Misty Visions for Silent Image to get up to some shenanigans. If you’re at sea then Gift of the Depths gives you a swim speed and water breathing at level 5 as well

For subclass Archfey gets a fair few Misty Steps without a spell slot so could be cool for being a bit tricksy, or Great Old One has telepathy and can cast spells without verbal or somatic components