I'm having a really hard time picking a religion for an Yerles pianist. .O.
I'd suggest either Yacatect, Opatos, or Kumiromi.
Yacatect is a god useful for pretty much anything. The bonuses to traveling and sense quality will greatly boost your skills in the long run. She has one of the best god gems (Who can say no to more platinum?). The goose pet is slightly bugged though, and doesn't drop platinum 100% when it eats. Her passive makes monster part drops more common, somewhat useful for a player-run shop. Rings/amulets are fairly common so sacrifices won't be too much of an issue.
Opatos gives bonuses to strength and weight lifting (Which is, as you'd expect, really useful for a pianist). The Golden Knight is an all around solid pet requiring little maintenance. Plus he's easy to please (Junk stones/Ore pieces can be found practically anywhere.). The boost to mining skill can be used to grind constitution for greater stamina.
Kumiromi's passive in E+ increases stamina recovery; which is used whenever you perform. Gardening is a worthwhile endeavor for a player who won't be fighting much. Edible wild plants/leaves can be found in the wilderness so sacrifices are not an issue.
I picked up a Mad Scientist. He seems pretty useless. x3
A wizard with no spells :V, useless sounds about right.
Has Elona+ 1.9 removed the treasure maps ?
I've gotten maps from dreams.