For Satan...
First we have Kagutsuchi, who is the embodiment of an infinite multiverse and the concepts of time and both creation and destruction in it. He's completely worthless, and higher leveled demons were completely unaffected by his death which took the multiverse and said concepts with him.
Then there is Metatron, the All-Seeing Voice of God. He's an important Avatar of YHVH, certainly more so than Kagutsuchi. He too is rendered worthless by higher-ends. The Demiurge, another, higher aspect of YHVH casually swats Metatron as if he were a fly.
Then we have Lucifer as above The Demiurge. He is immensely stronger than any other angel of Heaven, which includes the likes of Metatron and Sandalphon. As an example of how strong the God Tiers of SMT are, Hordes of Metatron are fought as regular encounters in Endgame Assassin and are dealt with easily.
In IV, Lucifer obtains a new form, described as himself as far superior than all his previous forms. The Archangels in response fuse into forming Merkabah, who matches Lucifer's new power. Both forms also have stronger Second Forms.
... And both Lucifer and Merkabah are scared shitless of Lord Krishna, and even Lord Krishna is far from unmatched, as he has obtained a lot of his power from the now weakened Inanna, the Mother of All Gods.
Innana at full strength is likely to be comparable to Mem Aleph, the Mother of All Demons. How strong is Mem Aleph? Well, in SMT: Strange Journey, she is displayed as superior to Merged Demiurge. Merged Demiurge is The Demiurge fused with Metatron, who is so powerful he is said to be approaching YHVH's former glory. Mem Aleph is above him.
And all of the above are beneath Satan, who acts as God's Judge and Executioner and is the strongest being aside from YHVH. Even Satan's Solar-Data, which is vastly weaker, proves way stronger than Brahman, the Supreme God of Hinduism who is likely on Lord Krishna's level.