First in Force.

[Samoht]

You seem to assume that the top-end guilds on this server have some kind of courtesy. They do not. If a guild is deemed to be moving too slow in the eyes of another, they will be leapfrogged.

Also, who is to determine what arbitrary amount of bodies constitutes a "force?" Are you going to set it per encounter? Will the values be adjusted down as the expected gear values move up?

No. Your solution is not better than the existing one.

One thing you have to remember is that this server caters to a specific class of man-children. You have to accommodate the worst in them, not the best. A FTE gives a clear log of who was the first to engage the mob, regardless of the amount of training or general douchebaggery occurring. Asking these people to agree to who was there first in force would turn the emphasis from something automatic like FTE to something that would have to be proven after the fact on every raid target.

You're basically moving the onus from legitimate kills to legitimate force, which still leaves room for young lawyers to skew the interpretation.

This is why they moved to instances on live.