My first toon (and my only level 70 atm) is a Paladin and is very dear to my heart so I say this with nothing but respect...but...

what...the...fuck man. 5 paladins for PvP?! 1 sucks enough. I applaud your efforts for doing something different and I can't wait to see how this turns out for you. The only thing i can think of is to go 1 holy 4 ret? Maybe 5 ret and off-spec heal when needed. I don't know. I guess you could go 5 holy and bore people to death lol.