Aim to get aggressive ballistics it will get you max impact on a felwinters, which is the only thing felwinters can have above other shotguns such as matador and party crasher so if you havent got the max impact and range offered its not really worth using. Per arc damage that only applies to pve such as raids or poe. At which point id never use a felwinters when found verdict dishes out alot more damage over time.

Arc I belive would be in case u use it in a night fall I believe? No difference in crucible. For crucible I hear hammer forged and shot pkg are what u want. For vanguard (pve) I would want full auto and and hammer forged.