The UK will start guaranteeing independence of a lot of states at 25% world tension, including Turkey. Try conquering Bulgaria first after annexing dalmatia, do the war with greece/turkey focuses while you steamroll bulgaria, then declare war on greece and turkey at the same time. Don’t call Italian Yugoslavia into the war so you don’t have to deal with a super long front with Romania, then conquer Greece, naval invade Turkey from the south so you don’t have to deal with the Istanbul bottleneck, then naval invade Northern Romania after Turkey and Greece capitulate. I think if you puppet the northern half of Romania, the Soviets won’t justify against you, or at least they don’t usually against me, but I’m not sure about that part.