I'd be for this in an optional side run that isn't required to unlock anything else. If it was in a run that was required for good gear, unlocking another run, or even as simple as a quest then it would get too much backlash from the PvP hating portion of the community, as while not directly PvP, you're still "competing" against other players. Still, as for the reasons for this in the run itself, I can see it as being a boss that as it stays on one party, a percentage builds up that when it reaches 100% kills that party. It slowly goes down when another party has the aggro, thus preventing wipes. You're competing with the other parties, as only the current lead party can hurt the boss, but you're also wanting the other parties to pull it so that yours doesn't wipe. You don't build aggro when you're hitting the boss directly, but once it switches targets, the aggro resets and has to reach a certain point to get it to swap again. Maybe not completely in line with what you were originally imagining, but certainly doable in a fun way that makes sense......
I'm all for this idea. It would give the raid a great deal of replay value. We've seen this on a small scale with the Cerberus fight in WoD, (at least if people stick to their party's job), but a full on raid with nothing but this would be great. The only problem I can really see is balancing it throughout so that one party doesn't have an easier/harder over all job than the others....
