Question for my Gatling plasma stars for solo en06

Right now my weapon is:

Furious - +5% per onslaught stack, +9 stacks Rapid - +25% weapon speed Steadfast - +50 DR while aiming Polished - Greater item condition, greater weapon dmg

Would explosive or 25% dmg while aiming be a better 2nd star? I know my 4th star should be Pin-pointers but I don’t have that yet.

I beat the raid in about 4min usually. I know you can cheese it with a certain placement of PA but it’s getting fixed anyways. Thanks for any help.