Yea its very dependent on the classes. I would enchanter would be one of
the worst to try to multi play. When I stopped pl;aying EQ to perform in a
play, my regular Thursday night group, did not want to tbreak up. So my
roomate, paid my $10 a month and played both his warrior and my cleric. He
said it was no problem at all. Granted he lost my cleric crowd control
(parking.and atoning), and we were no where near effective at killing
casters (when we were both playing in the same room we would pretty much
never see a enemy spell go off, between his bash and my stuns).

I could see playing a monk as a puller (in a multi group raid) and a nother
class (since essentially the monk could just stay feigned the whole time
without losing much).

However this stems from a specific question about loot rights and I would
say the multi played enchanter should not have gotten the robe. Primaries
should always come before secondaries. In my former guild, I got way ahead
of a lot of my guild mates in level, and started playing my cleric secondary
with them at times. I would always defer loot to them, even though I was
playing my cleric (and only my cleric) at the time the loot dropped. Its
simply common sense. The guild was best served by the the primary getting
the item.