Well it depends on what you mean by "competative" 1600 rating or 2000 rating?

Im not saying 2 rets will fail but the setup lacks mortal strike and your rather weak vs plate. Id rather take 2 DK's tbh or maybe ret/DK would work..

I would recommend you to go 2 casters or 2 meele, one of each will get though when people hump the pillars.

But then again 2 dps without a mortal strike will be hard, i can keep my 600 resillienced priest up for 30-60 seconds alone vs DK/ret. (unless there is some realy lucky critts) Then my cooldowns are mostly used and i wont be able to keep myself up, now give me 900 resillience and you wont be able to kill me before im oom. (well then i assume you wear 500-600 resillience and not full pve gear)

My DK will however pull the ret paladin away and slow both of you so i think we would have had a pretty easy win.