Alt Class Issue:
I strongly suggest to separate missions and provide them 8 times, via class. Reason:
I first got the achievement on a new char, then leveled my main to 20-30 and it was real fun to level him with the same missions - making some different choices because it’s not a dmg-class.
Now I try to level my 3rd class - dropped the 2nd half-way at level 14 - and it is exactly as I feared… since I started at 20 I do have leftover missions, but since I dropped low-level leftovers on the 2nd class already there’s barely any matching my level (which is likely close to the situation a brandnew player is in after getting from 1-30). So I stick around HS and Rainforest with the new class, venturing from event to event, that is all which is to do. Monster kills give 124xp, not really worth going for them, good only to kill time before the events start.
For the rest of missions I end up doing them on my main then dropping them on the alt class, prematurely, to boost it at least a little bit and be at least able to do events in more areas.
It would be perfect if whenever you switch class the mission-set changes to the progress of this class (except perhaps the weeklys which remain same but even these could be adapted). You can only see, work on, pick up and turn in quests when equipping this class. This would allow to actually play each class, fully, visit all areas, do events, do the kill missions etc. instead of feeding it with missions from the main which does not even work past the 2nd or 3rd class.
Also I more or less get punished for leveling alt-classes because others who only play one class can use the xp of leftover missions for the leveling-chests.