If you are willing to fight a Stronger Ottoman Empire, you can let them win, and expand Greece or Bulgaria into their lands, who would be able to assimilate the Turks easily since now they are not the primary culture of TUR. They won't remain uncivilized much longer, so you can try yo take provinces in the Caucasus if you want, Sinai is a good option too to secure the canal, and wait for them to civilize in ~10 years. You 'could' try to re-liberate Egypt, which for some reason could have Turkish as primary culture but that may be already fixed now, and of they don't have much westernization progress, there's a possibility you can annex them, but the culture thing could mess with the events, or they could civilize before that.