Please make the spawn locations fixed, or at least closer together. It’s nearly impossible for a small group (9-15 people) to find even a single boss (with 300 spawn locations), and the fact that other guilds are competing for them makes it worse.
Can you imagine how annoying it is that 90% of your guild misses a bounty because your boss goes down seconds before they get there?
If you can read this then it is proof that ArenaNet’s moderators just, kind and fair.