tldr:

• for sp: take hammer shot over serration (better for slash dps, but its weaker initially without merciless)
• if no primed bane, use normal bane. if you dont like bane, use hammer shot. if using hammer shot already use serration.
  ㅤㅤㅤㅤ- if you dont have hammer shot for some reason use heavy cal i guess
• galv aptitude is bad because it doesn't work on aoe
• [Bladed Rounds] is bad because you need to stay scoped untill the projectile collides to benefit from it (very annoying to use but theoretically more dps than hammer shot)
• primed cryo is worse than rime rounds for slash dps but it is more base dmg. you can use it if you want i guess.
• any ammo exilus works
• point strike + dmg mod is more slash dmg than critical delay + fire rate
  ㅤㅤㅤㅤ- [Kuva Bramma] has a reload rate of 0.6s and a charge rate of 0.4s. more fire rate only affects the 0.4s time.
  note: if you do have external fire rate, use [Critical Delay] though

idk if this image makes much sense or looks trustable but its the simplest way to show the calculated numbers (slash dps). you can see this link to see more details about it.
ㅤㅤㅤㅤ- calculator link: https://docs.google.com/spreadsheets/d/12OeFBa-LNXPRk97FoRe-G2lq8n1pTnZAs45S_APy8h8/edit?usp=sharing

it can kill everything. biggest aoe attack in the game + [Primed Firestorm] = can kill everything on screen in 1 shot. personally I simply use the minimap to aim nowadays since you can make it overlay your crosshair and you dont even need to actually see the enemies, just locate with radar shoot oops theyre all dead!

definitely my favorite weapon to play casually with. I hope you enjoy!