WLUC has applied for a power increase, from 63KW to 83KW.
http://transition.fcc.gov/fcc-bin/tv...=0&facid=21259 They would need to double their power for you to be able to hope to see a 3dB increase. The increase of 20KW they applied for will get at best a 1.2 dB increase on your end. For WLUC to reach you with you having a reasonable height antenna, they would need as much HAAT and ERP as they can get, which would require them to coordinate with the FCC and Canada. Given the incentive auction and repacking, I doubt WLUC would want to do all that work to potentially end up with a transmitter that is outside of the future UHF TV band.
For the model TV fool uses, a tower around 160 feet would get to a point where there is a usable amount of signal. (working from the partial lat/lon on your plot, the area you are is fairly flat so it should not make much of a difference for an exact plot).
http://www.tvfool.com/?option=com_wr...e1c63c917f83c4 (TV fools model seems to predict a jump between 150’ and 160’
http://www.tvfool.com/?option=com_wr...e1c6cbd1a0a376 )
Even going to 500 does not help much.
http://www.tvfool.com/?option=com_wr...e1c67428064b7f (A 160 foot tower with a NM of -7 seems easier than a 500’ tower with a NM of -3.5).