As a custom blaster user, I've always obsessed over dmg up. I didnt reach my intended gear yet, but I have a pure dmg dress. I'm trying to get pure bomb range pilot goggles and, the shoes being dmg main and 3x bomb range.
As someone has said, it depends on the maps and modes to what alternatives I might run. Respawn, swim, special charge, bomb range or include stealth jump for the longer maps. I favor all of these.
I'm also really looking forward to the neo luna, as my alt in a slosher and I've grown to love splat bomb with bomb range. Having a blaster with this sub is like heaven to me.