Would like to say again that the reward for top 3 rated players of each AC needs to be PER SERVER, as you have failed to provide the cross server queues that makes comparing ratings of players from different servers possible. If a potential of 96 "top" players per server sounds too much (and it probably is), reduce it to top 1-2 players per AC per server. The pros of this outweigh the cons for reasons I provided in a previous post, especially if you 1) Make rating reset upon character transfer from a PvE to PvP server (or just any server transfer), or more preferably 2) Lock the "top" reward from being used/displayed on any server other than the one on which it was earned. I don't feel like this would "require too much coding".
Just do top 1 per server. If youre not first youre last.