Since you are adjusted to what you hear, it may or may not be an improvement to boost the highs. I have read that those with high-frequency hearing loss can be more sensitive to changes in the highs.
I think correction would best be done empirically (i.e., by trial and error). I would start by increasing the deficient areas by not more than 1 dB. Listen for a while. Then adjust more (or less), if you want.
I also would use very broad (say, Q=1 or less) corrections. This assumes you're using parametric EQ that lets you control Q.
Hope that helps, and good luck!