MCH. While the burst rotation is more or less the same, for the most part the class is playing as how you decide skills are necessary and most beneficial based on the situation. Sometimes it's better to save certain skills for later, other times its better to go ahead and change turrets to preemptively prevent a MP problem, and sometimes it's best to just hit the enemies with everything you've got....

Also, I'm lonely as one of the only MCHs out there. I've still yet to see another MCH in Void Ark.....