I’ll try to be brief.
Recently, I’ve been seeing topics like “who is the strongest demon” and “are angels stronger than demons”. You know who the strongest spirit is? I’ll tell you:
It doesn’t fucking matter.
Let’s take King Paimon for example. Some have had overwhelmingly positive successes with him, while some have had no success with him at all. It’s not a display of how powerful he is. It’s a display of how compatible he is with certain magicians.
The concept of power levels can also be dangerous. Let’s pretend Andras shows up in your life because he wants to work with you on a certain goal. If you said to his face that he’s not strong enough to help you with something, he’s going to be pissed.
A spirit’s specialties, ranking, race etc. do not determine strength. They’re all powerful. Just pick who seems the most appealing to you and go with it.