Cross Class Combos for FFXIV?

[Kashius]

Well they already have battle regime effects that do these things.

I don't think you fully understand the concept here.

Battle Regimens are an organized thing. Player A, B and C each have a specific attack they carry out in a specific order. BR mode must be engaged and disengaged.

Cross Class combos would be a more spur of the moment thing with the possibility of attempting them in BR. As a LNC mid-fight, some ARC could randomly proc "Punctured". Without needing a special mode or anything activated, you can capitalize on this if you react quickly for a big damage Trammel (WS). It is basically a system where each class can cause a critical opening on the target that other classes can take advantage of.