DOUBLE POST LOL
Ok I looked through the logs for Team Awesome's last Omnitron kill vs Team Epic's last Omnitron kill and did some more in depth analysis. This kind of thing is great for working out if the difference in DPS between you and another person is down to gear or rotation.
Rotation wise, Zerne has more of his damage coming from Conflag than you did on Omnitron, with Zerne casting it 26 times to your 22. This is not a huge difference, but it is possible therefore that Zerne was hitting Conflag when it was off cooldown slightly faster / more.
Looking at Incinerate, both of you's main damage dealing spell on that fight, Zerne averaged a 30.4% crit rate with it over the course of the fight, while your crit rate on Incin was 30.5% - so almost identical crit rates. The difference here is purely down to gear - Zerne's Incinerates on average hit (non crit) for 3k more than yours do - so no need to worry, a pure spellpower issue there. This gets even bigger when you look at incinerate crits. Your average Incinerate crit for 25k on that fight, zerne's average incinerate crit for 34k - a 9k difference per crit, this is alot.
DoT uptime is another key difference, with Zerne managing a 96.4% Bane of Doom uptime. Your BoD uptime was 36.8% - so there is a clear difference, make sure to keep BoD up
Zerne used an Infernal too - which is a good dps boost while it's up.
One thing I did notice was that you seemed to cast ALOT of incinerates - 82 to Zerne's 56. I am not sure, but seeing as Zerne has more haste it is possible therefore that times spent casting Incinerate for you might have been better spent casting other things, perhaps more conflags or better Bane of Doom Uptime. I THINK (but I may be wrong) that Incinerate is essentially your filler move in the priority system, i.e you cast it when you have nothing better to cast. Refreshing dots, conflag and Chaos Bolt are all probably higher priority.
I am seeing a MASSIVE disparity in average crit damage between the two of you though. Zerne's average Conflag crit was just over 40k, whereas your average conflag crit was 28.7k - so his conflag was, on average, doing 11.3k more damage than yours on a crit. This is again down to spellpower I reckon, as the difference between an average non crit falls to just 4k - due to the way spell crit damage modifiers work this could easily work out to the 11k difference we've seen here.
Another difference was pet damage. Zerbne's Imp was doing 3.7k dps, while yours was only doing 2.2k. This can probably be explained by glyphs - Zerne is using the Glyph of Imp, which buffs his damage quite abit. I would say swap out the Glyph of Chaos Bolt for the Glyph of Imp. Zerne also is using Glyph of Immolate instead of glyph of Incinerate - so you could try that too.
Omnitron has gimmicks, so alot can depend on how well you are getting into puddles for the damage buff. In addition, Zerne has better gear than you - which means he should be doing more damage - we can see from the logs that, overall, discounting some issues with Bane of Doom uptime, most of the difference is his spells are simply hitting harder than yours. So, take heart, gear will help!!!
If you can get logs from something like a Chimaeron kill, that would help alot, as alot of the time DPS on stuff like omnitron is affected heavily by gimmicks of the fight.
Hope that was in some way helpful! Please don't take offence at anything I said above, am just trying to help