We did Halfus > Chimaeron > Magmaw > Maloriak > Atramedes
In terms of time spent on the encounters I would say rating from least amount of time to most amount of time;
Atramedes > Halfus > Magmaw > Chimaeron > Maloriak
We simply took a long time on Chimaeron because we were doing the encounter wrong for about 4 raid periods. *le sigh* We did Atramedes less than 1 night and Halfus took 1 full night.