I would suggest reducing your FTP and MAP settings by 10 - 15%, depending how well trained you were previously. Your MAP setting is key to the Half Monty as that sets the steps in the ramp.
I think you need to complete a minimum of 5 steps to have a valid result, but if you reduce your settings too much you could end up completing the full ramp section without actually reaching the point of failure.
Your AC & NM numbers won’t need adjusted for the HM, but if you intend to try a few workouts before your Full Frontal you should adjust these too, or any sprints (in erg mode) are likely to be a bit challenging.
I recommend doing some moderate rides on the trainer over a few days to get back into the groove and then doing the 7 day Test Prep plan. It’s a 7 day plan with a HM on day three and a FF on day 7. It gives a good consistent lead-in to the FF, and the HM results set suggested targets for the FF, which is very helpful in pacing. I try to hold and just exceed those suggested targets during the FF.
Yeah I would definitely do some rides before testing, and don’t artificially limit yourself to a week of them just bc that’s what the prep plan covers. After that long of a layoff, you’re in noob gainz territory for a little while, meaning:
Pretty much anything you do right now will improve you equally, partly just from getting the muscle recruitment patterns back but even the endurance training “signaling” is not that complicated: you get an aerobic adaptive signal for every muscle contraction, and when you do the right combination of duration and intensity to deplete muscle glycogen, you get additional signaling from AMPK. For a brief magical period, you get this from moderate intensity exercise at a dramatically lower fatigue cost vs HIT.
As long ans you get the consistency part dialed, you’ll adapt so quickly that the training targets you get from testing super early won’t even be valid that long.