Without a group parser how does someone know how far from the ceiling their skill can take them? Like I could see a Mnk doing 1k does some changes starts doing 1.2k but stops improving not knowing they could get to 1,600 with their gear.

Not saying put an active group DPS.

Give everyone a essentially a in game Social security number.

You can go to a ranking board, of say sephirot extreme. Look up your job see where you stand in the world. Now imagine this MnK sees their 1.2k is enough to beat it and they weren't carried. But they see their like 99th place on the server for that fight, and sees a MNK did 1,650. They will KNOW they have plenty of more room for improvement without an active group parser.