Hiya,
the vernier cams only adjust the timing of the camshafts, not the ignition timing.
Be very careful if they are set up wrong. They could cause the valves to hit the pistons. Get them set to the figure given by the cam supplier.
16 degrees at idle is too far advanced. I dont know the exact figure but 10 degrees is about right, give or take 2. The ECU will control ignition advance from idle to max advance. Sorry, I dont know how the MBE sets idle timing.
I'd recommend a rolling road session to get it all set up correctly.