Rank 13/14 is deffo really really far from achievable because some people will be "no lifers" ( 2 people farming in shifts for those ranks, lets be honest this is how most of them got it or they had a system on the server with a line up of who's next to get it).
But you can always push rank 10/11 fro some nice rewards with not death core play style or just raid and get the gear from there.
+you get great items from the PVP reputations system I think some of the BiS shoulders for warr come from AB rep.
Anyway its like getting the "Seasonal PVP Mount" only like 10% of the pvp players get them and no one cares so its the same with Ranks 13/14