Your post really didn't reveal any new information, or add to the discussion at all. Saying you got the fight with the standard strat really doesn't move the thread along.
Try to ensure there's new information in your posts in future. At the very least, you could have explained where you were falling apart before, and what changed to allow for the completion of the fight.
Yesterday we managed to kill Sartharion + 3 finally! We tried bringing another healer bringing the total to 7 (!) and 4 tanks. We found out the best thing for us was to stick to the following kill order:
This means we opposed Blizzards new preferred tactic a.k.a. killing the Shadron disciple multiple times to reduce incoming damage at MT. You need a bit of luck by doing so but it reduces the number of possible bad firewall-timings when coming out of portal.
Also: we used our bloodlust right after the first fire-wall coming after Shadron has landed. Don't use it the very moment he lands because when you do and the fire-wall comes right after it you loose precious bloodlust-time.
After all this fight showed me the learning-process (avoiding) and rotation a.k.a. communication between players was most important. I want to thank you all for all input.