Played a short session against some 50nl hu reg yesterday. Whenever my range is weak he just raises and reraises and that's his gameplan in a nutshell. So there is basically no way i can get him off anything on 55Qr. Good chance he will stack off with A high if I c/r or lead.

That's a spot I struggle a bit in general. When both ranges miss and I know my donk bet will get raised a lot and when I check I will face a bet and he'll stack off very light to a c/r.
I guess I shouldn't airball bluff and rather get it in with a pretty linear range starting with AJ high or something.
I also don't want to go into c/f mode too much and loose the dynamic. ldo I will happily get it in with 2nd pair to the board.