@Harwen: How does necromancy affect rotting? I don\'t think you\'re in the right aspect. Rotting performy well without necromancy, it\'s either _time manipulation_ in which case you\'d not affect the rotting itself, only the time the object experiences, or earth magic, which does not have anything to do with necromancy IMO.
@ Questspaces/party/logging off:
Why would that be a problem? I mean, if you\'re in a questspace with a party and you or someone else logs off, there should be no difference for the remaining ppl. They\'d be in the same questspace and you simply vanish (here we have the inevitable problem of immersion loss due to RL constraints). If you reconnect, you get to respawn at the same point as you left, or at the point most of the members are or were last (assuming they logged off as well). No splitting. As long as the quest is _active_ it could be held on the server until they finish it, since the same would be done without questspaces: hosting the quest state per player, wouldn\'t it?
If it\'s not the current quest, we might have to resort to store it per player to avoid inconsistencies (or rather, make them the rule).
Same if you afterwards change your party and add new members: the ony who _invites_ the others sets the master questspace, overriding all other\'s.
Suppose three ppl. have started the quest, one hasn\'t and two have already finished it.
The guy who hasn\'t yet started the quest invites all these into his party and they enter the quest: -> it\'s entirely untouched.
It wouldn\'t be usable for item duplication, because there will only be the same amount of stuff in the questspace, regardless of the number of players, so they\'ll effectively be worse off compared to doing the quest alone.
So they enter the questspace and this replaces the questspaces they might have had, deleting the old ones.
After finishing and leaving, the space would be split, assuming they will most likely not go back anyway.
Not perfect, but the best I can think of currently.
Of course, it would be impossible to \"meet at the place of the old wizard we murdered last year\".

Maybe I (or somebody else) can think of a better way later.