One and done thoughts, suggestions, experiences

I was sober for the last 4 years. I relapsed on oxycodone for about 4 months (was using about 3-4 80s per day when I quit) I went through some withdrawals but I didn’t want to end up on a super high dose. I was able to stabilize on 8mgs of suboxone per day (4mg in the am and 4mg in the pm) for the last 2 weeks. I have a lot of other supports in place. I went to the doctor today to inquire about getting off suboxone using sublocade. She recommended that I increase my dose to 12mg for the next week and then get the 300mg shot. Do people have success doing one sublocade shot and quitting(even if it’s the 300 opposed to the 100)? It seems counterintuitive that I’d have to increase my dose to 12mg…. Now I’m having second thought… Would the 100mg shot help me come off of 8mg or would it not be enough? Any thoughts, insight, experiences, etc would be much appreciated because I feel very conflicted about increasing my dose and getting the 300 shot…. Thank you in advance!