I don't understand why claim has to be tied to party?

Let's say we're going a leve or behest ok? 4 man party.

Player 1 engages a group of Yarzons, causing their names to turn red. Player 3 assists him by sleeping the adds.

Player 2 engages a group of Aldgoats, causing their names to turn red. Player 4 assists him.

So basically, every member of a party has their own claim, which is shared by the party. Thus, the party can claim multiple monsters/groups of monsters, but each member of that party is limited to claim of 1 mob or group of mobs. It worked similarly to this in FFXI except it was really convoluted, because they made different claiming systems for party and for alliance, and the way claim was held was really inconsistent.

For initial claim, SE had implemented a system where a party had to perform 2 actions on NMs for their party to receive claim of it. Which did little to deter botters, because the botting programs they used coordinated all members of the LS to target a specific window based on the time of death of the NM, and each member's automated claiming action was staggered by milliseconds to avoid conflicting with the "lockout" period in which a mob was unclaimable within the first seconds of it spawning, causing players attempting to claim it to have their action interrupted. Or at least, that was my understanding of how the latest wave of bots in FFXI had operated over the last couple years.

I'm no genius programmer, but allowing a frenzied free for all system seems like the WORST solution. All strategy for avoiding TP feed to a mob, positioning of mages and ranged attacks, directional/conal attacks being absorbed by tanks is OUT THE FRIGGIN window. This is MPK city.

And it's MPK that is completely within the ToS. If any mob is attackable, then people can send in small groups of players to disrupt enmity, feed large amounts of TP to a mob with damaging AoE abilities, or change its direction to encourage it to use conal attacks on mages and people recovering from weakness. This is a complete disaster.