My 2 cent. If the piano is clashing with the bass in the lo end cut it more below 120Hz. Try widening the piano in the stereo panorama and the bass below say ~200 should be mono.
Or make a sidechain from the piano to the bass to duck it a bit on some notes. Double the track and the low notes duck. Not full though.
Marco.
I need more time!
https://www.kompoz.com/music/artist/Potzblitz
https://m2k1.de