We are working at this moment on yogg+0 and i wonder what dps required for killing yogg+0 with zerg tactic? :P My math is 3.3 million health/ 7 dps/ 60 seconds( time when 6th guardian spawns and tank is pretty much is dead)=7,8k dps, what is really really high and im not sure that we can pull this. Correct me if im wrong and share you experience please.
Just go onto World of Logs and find a parse if you want some empirical data.
You're going to have to take into account Lunatic's Gaze and it's effect on your dps to some degree, I understand you're zerging it and I don't have 10 man experience myself (although I have done it on 25 man), it's not uncommon for people to get unlucky RNG in p2 and find themselves low on insanity at the beginning of p3.
However with a Bloodlust, haste pot and all your cooldowns, 7.8k DPS over 60 seconds isn't that high provided you have a reasonable balance of raid buffs on most fights, however I've never zerged Yogg+0 and don't understand how that would make it any easier if I'm honest.