Assuming we have 4 people who work incredibly well with each other and have levels of coordination that borders on telepathic, what kind of equipment loadout do you think would be able to carry them through almost any level in the clockworks?
A team of a few guys packimg vortexes and antiguas come to mind. Maybe a Suda and Blitz to nuke the vortex'd enemies. Hazes would be great too I suppose.
Your plan --- one knight placing vortexes and the other knights using big charges --- sounds good. I don't know why you bring up Antiguas.
One knight with Combuster, Acheron, and Blitz Needle can destroy anything in the Clockworks. Throw in Dark Briar Barrage if this knight wants an easier time dealing with fiends. But that answer is no fun.
A party of Nitronomes with CTR+6 is pretty hard to stop. Replace Nitronome with Dark Briar Barrage and Dark Retribution if you want less knockback. Throw in a haze bomber if pure damage bombing seems too boring.
If you're looking for more interesting teamwork, consider sending a knight cloaked by Maskeraith behind enemy lines, to deliver a Warmaster Rocket Hammer dash against a key turret or other enemy. This game's tactics aren't super-interesting, but you can do little stuff like that.