Gerald
I think you are over thinking it.
The prequalified details for CJPs don't present an order of operation... That is something that can be provided above and beyond the code.
How do you ever know the joint is suitable..?!?!?!?. The welder can grind a bevel, they can gouge a bevel, they can flame or plasma cut a bevel... Or somebody can hand them a bevel... Managing quality is up to the fabricator in every scenario.
Both the TC-8a GG J-groove and the TC-U4b GF have Bevel-groove have a 45 degree groove angle... One can be gouged and one can be sawed, flame, plasma, grinder.. See what I'm saying ? Make A WPS joint detail that matches the work to be done.
If you have an operation that requires a backing fillet on a CJP corner joint or a CJP T-Joint and then gouge from the other side to sound metal... Well,,, You train your certified staff to accomplish the task.