Gnashing Fang Combo, one button?

[Shurrikhan]

It's easy to assume it's artificial difficulty, but the fact is we don't know how all of these things are coded. Maybe the combo has to be on three separate buttons because if it isn't then interspersing literally anything else will break it just like it does with Continuation. You use ANY GCD skill during during your Renzokuken without first using Continuation and it cancels the Continuation combo for that step.

...Sonic Break?
...Burst Strike?

That's literally 40% of your single-target rotational weaponskills that are not themselves Renzokuken.