For fun: What will Bastion's abbreviation be?

The obvious one is BTN, but... Botanist already exists!

BST? Beastmaster already took it.

BSN is another, might skew close to Blacksmith (BSM) though.

BAS? Feels like the same energy as people that wanted Gunbreaker to be GUN.

All the good ones are taken or kind of adjacent to others that already exist, but if I had to guess BSN is the likely one.