not to be mediocre of course.
if he stays competitive "enough", he might possibly achieve not to relegate but next season will hardly be an improvement. instead, cutting all loses might result in one or two trainable or profitable tranees and also good chance to rebuild a balanced and smaller roster. i am not just recommending him to sell 5-6, this is the minimal caution for me. he should sell as much as he could as long as he gets the fair prices.
Ok, so you're suggesting he cut his roster down to a small number of players (like 7-8), lose just about every match the rest of the way and focus on training.
I guess that's workable if you're thinking long-term. A good training plan takes at least 3-4 seasons to turn anything out, though. It is also going to be tough for him to win anything in that time period as all that losing will make it difficult for him to turn a profit.
BB tends to reward teams that win games, though. So I'm not sure how well this would work... But I've never tried it so who knows.
Run of the Mill Canadian Manager