[Vlak]

But if the agreement/rotation has AG lined up for the draco kill, and they're in the zone waiting for spawn, I would think they have a more legit claim than a 3rd party who doesn't recognize the agreement/rotation.

Couldn't the classic "talking to the other guys" strategy still work? Even if the interloping guild is not on the rotation, could they not semi-insert themselves on it by joining up with already-clearing guild? True this messes up the loots, especially if both groups are after the same drop. But if the guilds are tiered then why not institute a "keying" system for up-and-comers who want a shot?

Ex: You want a shot at draco? Join an existing rotation member on a kill (pre-arranged or impromptu) and show you can handle it. Kill the draco, you get on the rotation, your guild moves up a tier (or progresses towards moving up a tier). Looting rights etc. would probably have to be case-by-case for these sorts of things, though, which would be a snag to work out.