We'll first things first. New sims I checked show outlaw outperforming assasination in 840 ilvl (Link:[I cannot post links but its just simcraft results.)
In my raids comp, I and another rogue will be gluing ourselves to priority targets or bosses. We seldomly take part in AoE, Cleave, or adds.
Now that my role in my raid has been established.. Would it be worth full on swapping to Outlaw? Orginally I went ass like the sims suggested for the start of legion. My Artifact's power is currently lvl 15.
I also leveled Outlaw's up to run mythics with my grp we needed more cleave so it's currently lvl 14.
I was talking to my GM today about it and he got rather frustrated because I was asking if I should swap to outlaw (Don't want to mess up the comp by swapping. He said pick the highest single target DPS and play that.)
With what I've done in mythics Outlaw hasn't even touched the DPS I pull in assassination. I'm fishing for bones correctly. I don't have the best trinkets but still. At Ilvl 844 I can burst at nearly 600k dropping down and holding 190k-240k (Depending on the fight). With outlaw I've only had seldom moments where I touched the consistent DPS I can pull in assassination. With burst being around 200-350k and dropping down to 150k- 200k.
Now my final question, With the role I'll be playing in raids, Is outlaw or assassination best suited?