Suggestion on P3 Blackhole
Support Grab both Tether on set 9
DPS grab solo tether on set 10

This allows Chaos tank to never have to chase Tether 10, get killed by an auto attack after hitting 1 HP, and allows Chaos tank to always drag Chaos to a static location relative to Kefka (party follows) and allow full melee DPS uptime even if they have the tether.
It also allows Chaos to be recentered when returning to center to stack puddle and move out.