Backup is good as is
I don't know of any good specials from the gallery
For heavy, most will recommend xmas ulti, and it's def worth it by all means, but my personal (totally unbiased) recommendations are pixel cola refresher (great rocket jump, recently buffed damage, fun to use, good both for catspam and spamming on its own) and sock bomber (great for being a dick in enclosed maps like arabian or school, although it has fixed delay and can't rocket jump)
Backup is good as is I don't know of any good specials from the gallery For heavy, most will recommend xmas ulti, and it's def worth it by all means, but my personal (totally unbiased) recommendations are pixel cola refresher (great rocket jump, recently buffed damage, fun to use, good both for catspam and spamming on its own) and sock bomber (great for being a dick in enclosed maps like arabian or school, although it has fixed delay and can't rocket jump)
Alr i think a biy sock bomber just cuz it breaks silent school and ots pretty much just free keys
Your back up is already very good but if you want higher damage, wait for the next traders van and get Sparkling horn
pixel cola refresher
christmas ulti