This was in fact high risk plan with almost everything could gone wrong... If he didn't had sticky fingers all over political circles and world security. In fact it probably gone kinda wrong due to Iruma, but we will see.
[Baal has saved iruma from the princess because she is extremely obsessed. Of course, it's stupid that he stole iruma's moment. Luckily, the most important demon got that.irumas reaction I mean. namely Mephisto the King Maker. in my opinion.]