I also tested with 2+3+4+5 and had no problem. I think that's OK because with those cheats without infinite HP, it's still VERY easy to play. With 2+3+4+5 I can level up very quickly, that means both offensive and defensive level go up very high. And using B button with cheat #4, power meter doesn't decrease, most enemies are one-hit or two-hit kill by B button which I can use always. I played until act 4 very easily, I guess act 5 would be the same. Already very easy, infinite HP is not necessary. Thanks very much.