[Meteo]

You know what would be good? Make it so that other players are unable to attack something once someones already began attacking it. Hm... well, then that would be hard if you were trying to help someone kill something. Perhaps make it so you can only attack it if you're in the same party as them, or in a KQ.
Or perhaps make it so the person can choose to reject the kill with one simple click and thus make it possible for people to take it.

^^;;

In FFXI, if you attacked something, it was yours, no one could hit it.

But then you could type /help and the mob became yellow, it even blinked red and showed u on maps where this mob was but it became a no XP mob, so u could run to save the day, it was a really cool feature.