I don't have my copy of D1.2:2014 with me, so I cannot reference the figures you are mentioning.
That being the case, let me outline what needs to be done.
Qualify the fillet welds first. Qualify the largest single pass fillet and qualify the smallest multiple pass fillet (typically three beads). A successful qualification includes macros and fillet breaks to ensure soundness (macro) and fusion to the root.
The values for the welding parameters, i.e., voltage, wire feed speed or amperage, and travel speeds established by the fillet qualification are used to weld the groove test assembly. The purpose of qualifying the grooved assembly is to verify the mechanical properties are met. That means weld soundness, guided bends, and tensile testing.
The welders are then qualified for the particular product form that will be used in production.
Word of caution, I don't have the code sitting in front of me. I'm in Boston and my code is in Connecticut. I am not telepathic, so make sure you read the code carefully to satisfy yourself you are doing what is necessary. Then consider whether you are going through the exercise just to satisfy a code requirement or are you actually doing it to learn what parameters will produce the results you want in production. I hope you are shooting for the latter.
Best regards - Al