Saturn is only going to command Seraphim
Those aren't necessarily Battle Scars, it could simply indicate that Gorosei were once Attacked & nearly Killed
It could have happened in God's Valley
Only Ghandi has the Design & Weapon to be considered a Fighter & no surprise if he is a Top Tier
But my Headcanon tells me that he & Koushirou are Two faces of the same coin
Meaning they were both training someone to become Stronger (Kuina & Someone else) but both ended up dying
However, in Kuina's Case, there was a Successor in the form of Zoro who inherited her Sword
But in Ghandi's Case, the one who should inherit the Sword wasn't interested (Possibly Mihawk), so Ghandi ended up keeping the Sword
So overall, i don't think Gorosei are supposed to be Fighters, except Ghandi who i'm not gonna overhype like some do.
Also seeing how Current Cover Story is literally being told like a tie-in to current Events
It's possible that Saturn's Meeting with Vega is gonna be shown in Cover Story, where Saturn was present during MADs End
It's even possible that Germa Cover Story will end with them deciding to capture Vegapunk
So if they are near Egghead & they find out Gorosei is there, they will definitely think of capturing him instead to blackmail WG
Saturn imo works more as a Hostage or Plot Device rather than a Fighter & i expect same from others, except Ghandi