Mythic Iron Maidens, need some help!

[Paylor 1]

So my guild has gone through ~120 wipes on this painful trio, and we seem to have stalled out a bit. First off we're using the two boat start. We spent just about our entire raid week being able to get to the final burn phase, kill off Marak during lust, and wipe with Sorka at ~13% and Garan at 18%.

 

As much as I'd like to say that we just need more pulls, we appear to be making absolutely zero progress past that point, and I don't think that's the case. Could it just be a matter of not putting out enough dps to burn them in time?

 

Any help would be much appreciated, thanks.

 

Logs from the other night: https://www.warcraftlogs.com/reports/xhwY9MjZ1amPfJvy

Edited June 12, 2015 by Paylor