In 305-303 BC, years after the Macedonian satraps of the Indus were expelled, Chandragupta waged war against Seleucus, one of Alexander's generals and former satrap of Babylon. IOTL the war was wrapped up relatively quickly, with the Seleucids ceding eastern territories to focus on the west, maintaining friendly diplomatic relations afterwards. What if Chandragupta wanted as a western neighbor a Diadochi which would prioritize the Mediterranean and Mesopotamia and Western Iran, and subsequently allied with Antigonus in the west, invading Seleucus and deposing him, using it to create a buffer of nominal satraps, tribes, and other polities, to defend his possessions in Eastern Iran and the Indus Valley. He does not take any more territory, considering that doing so would overextend his empire, but he does loot the old Achaemenid treasuries and alters the local balance of power. How plausible is this?