Perfect solution! Don't even worry about making missions droppable now, as far as I'm concerned. My only standing request now regarding missions would be to make completing a mission count for every member of the group who has that exact mission (i.e. Not having to defeat Clockwork King 3 times, because three people in your group have the mission.)
Thanks!
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on Virtue
Cetyo, 50 Nrg/Nrg/Force Blaster
Pikti Vox, 14 Peacekeeper