This is like asking who are the best athletes in the special olympics.
This might be a PvE server but I'm pretty sure there are some pretty good players here.
-They transferred back from PoT5/Bastion after 8v8 ranked ended
-They just play here occasionally while they have their mains in PoT5/Bastion
-They don't care about this game anymore and they just want to play with friends who are on this server
-They transferred back just to do PvE with their friends/Guild.
-They never bothered to transfer off this server for whatever reason they had.
And the list goes on .... >.<