Though the daze/missiles phase gives the option to do it radially (running in to dmg then back out to heal); and the chase phase has O2 tethered to the main room (can’t chase fully down the corridor), so both of those do have some element of fairness to them.
Dance only having the one, fast-moving, window to join/leave the combat, makes it harsher than either of these phases IMO, as any mistake (whether player or lag) that causes you to take damage increases the chance that trying to exit = death, so really only the higher pet levels (or skill) allow dance to be done in relative security.