It's not a matter of spawn "Speed" it's just that they all repop at the same time. regardless of when any of them were killed at all. If your killing them all at the same time "Linking them as a person above stated" they will still respawn at the same time.

I can handle the monsters 5 ranks above me very easilly I just can't handle 3 of them at once when they spawn ontop of my face while I'm killing the next monster down the line.

I think it's silly that I can't kill my way through a corridor because the spawn timers don't care if you killed anything 10 seconds ago or 3 minutes ago, hell if the spawn timer started ticking for the group as soon as I killed something it would be nice. But as it stands I'm gambling wether I can actually kill more than one monster if they are in any sort of coridor or spawn close to eachother.

Having proper spawn timers on the monsters wouldn't hurt anyone "Exp or farming" if they actually looked at it properly. Not being jumped by random respawns also leads to less hectic party play, leads to more efficient kills, less MP spent, less time wasting MP (Dem mages never have MP so I'm told), and longer sustainable chains.

This might not hold true for Spirit bond parties that just zerg everything but designing world monsters around people at max rank isn't the way to go. Keep the group clocked spawns for strongholds where they need fast respawns, and people could care less about positioning. Give us a logical system for spawns where people need it (Open world)