@al3x Help us understand your question better by describing what is wrong with what would at first glance seem like the canonical answer "Every few months, read the list of installed plugins, and delete those you aren't using."
When you say "a few plugins", that sounds like you have about 6 (which is what I have). Do you actually have a lot more than that? Might the answer then be "Use fewer plugins, so that the resultant complexity is not too great to keep track of."