I agree with pure this event needs a slightly smaller area.. but rather it needs a more precise area - I felt like we didn't really know what was considered the field.. and I think I spent a lot of time in the half you may never have entered ( you were always on the one side anyways).
During this event I found a much more fun event... that could work.. but maybe to imbalanced to work.. but I'll throw it out there.
Basically though you divide us in to two teams by class, all healing classes on one team all dmg classes on the other (AKA Paladin and Shadow Mage vs Warrior and Sorceresses.)
GM needs like 10k hp.. (maybe more/less idk whats fair since we can't see turnout/test it really) and Tries to kite players. Also.. possibly request a GM item from the devs that removes the pk limit for you so anyone can fight..
Then the healing classes have to keep the GM alive for a set amount of time.. to win, and the damage classes have to kill the GM before the time is up..
Which ever side wins gets prizes
.. - enchant/rune stones or enchant/rune protections are good prizes for this kinda thing... Since it is always valuable to the player regardless of level/class.
In Kingdom Heroes there was an event that gave large amounts of people prizes.. you just make them line up and not stack, then hand them out 1 at a time... anyone who doesn't obey is skipped and we have more then enough GSs to watch the line/help hand out prizes.. If necessary.