Did read through the topic you referenced… I wonder if you’re looking at that in the most simple way. If you’re fine with default trust level accession, then most members that come back repeatedly will be rewarded member tl (15 non-consecutive days I think). Whereas to reach regular tl, a member needs to visit 100 days in a row. So I don’t see how activity in specific areas would change these basic attendance calculations much. By default member is not supposed to be such a big hurdle for anyone participating. While as regular requires quite an outstanding commitment.
That said, you could also look at
Could probably change a few settings with this plugin out of the box. Or ask the maintainers to add a setting for you.