Samael/Lucifer Morningstar
Powers: Infinite Will of God.
Basically he can do anything besides creating from nothing, willing knowledge into his head and permanently erasing archangels and above beings like Michael, Gabriel, God and Goddess from existence.
Anything else you can imagine, he can do.
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Michael Demiurgos
Powers: Infinite Power of God.
Michael can basically destroy anything and everything, besides of course God and Goddess. If Lucifer didn't defend himself in anyway, and Michael point blank hit him with all his infinite power, Lucifer would cease to exist.
Michael is just absolute destruction and creation. In the sense, he can create Infinite matter, but can't shape it, that is what only Lucifer and God can do, and to a certain extent Asherah.
Michael can destroy some things such as effects and the like to a certain extent. Basically a creative way to alter reality a bit, but it's too risky. One wrong move and he erases it from existence which is not something Michael wants to do. He simply doesn't have the finesse and can't rival Lucifer in his authority over Reality.
Yahweh/God:
Powers: Both of what Lucifer and Michael can, but simply better and more. He also has the gift of Omniscience making it so He can know anything He wants whenever He wants. Though there is some knowledge He can't know, there are some limits but I don't wish to get into that yet.
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I'll update this in the future, but for now ranking of power is this, though of course them at their peak and not injured, because as of when this is written Lucifer is currently injured.
Number 1, Strongest ever: Yahweh/God
Number 2: Lucifer
Number 3: Michael
Number 4: Asherah/Goddess
Number 5: Gabriel
Michael and Lucifer are very close but Lucifer Is simply the better combatant and can do more with the Will, That's what gives him the slight edge. He's simply a master strategist.
Though they're still very, very close.
Goddess without Her connection to Yahweh is below the Twins, with it, She's Number 2.
I hope this is clear enough for now.