*Lots of failure*
Last boss was fairly uneventful compared to the rest: Tank and Marauder ignore kill order and attack commander first. Sorc DPS both of the two big Raks first and helps the other guys kill off the commander.
While I know some people learned to kill the small one first, I can tell you when tanking this its rather nice to kill the commander first since he makes taunting useless.
Once that done, even if an heavy pin happens it will be on the tank, to which the healer can easily keep him alive with moderate output, while dps continue bursting down the big guy.
In the end both way work, and its not an especially hard fight.