You have Complete Arsenal, youre literally the embodiment of omnipotence. Complete Arsenal is an expression of omnipotence; to have all powers. You are immune to any and all powers including meta power manipulation, etc. Why and how? You have every power, including all immunity powers and powers that allows you to exist outside of reality. You could be like Ajimu Najimi and attempt to create a story and try to thwart yourself, although she failed and tried to kill herself because she couldnt accomplish nothing. She spends trillions of years attempting the impossible again and again and succeeding again and again, she kept attempting the impossible hoping that she would fail, because she realised that she was in a manga. Just a thought, although according to her, "If you want to become a junk character like me then come find me."
Well I feel it's really up to the user. Let's take Ajimu Najimi, a user of Complete arsenal. She is 3,402,193,822,311 years old (246 times older than our universe) and possesses 12,858,051,967,633,865 abilites (12,000,000,000,000,000 is 12 quadrillion). There are many instances in the Medaka Box manga in which she sort of, "Lets things happen". She has been sealed away multiple times in the story just because she wanted it to happen and allowed it to happen. It also has to do with creativity. Ex, I could just make it so that all powers except my powers are now gone, or I can reshape this existence into one where only I have powers, or I can just let them be since it isnt as if they can do anything to me anyway. Be creative, if you have limitless power and you come accross a barrier, go around it and not through it