Build interrupt macros that automatically target the right boss frame for your kick order: mark, plain kick, or focus depending on where you sit in the rotation.
Park this on a spare key for when a kick slips through and someone calls for backup. It grabs a Termination Matrix, kicks it, then drops you back on your target. Dependable when one is left; with several still up it takes whichever it finds rather than the one that was called, but a landed kick beats a missed cast either way.
The generator hands out a different macro depending on where you fall in the kick rotation.
Requires the Northern Sky Raid Tools (NSRT) addon in-game. It is no longer a WeakAura. Read the NSRT guide.