A quick thought. I personally lay a great deal of store in the Book of Enoch. Others may not. Respect for difference of Biblical opinion. But - picture this:- If the fallen angels begged Enoch to intercede for them - begged Enoch to petition Almighty God, on their behalf - this means that the devil has already lost access to God's presence. He can no longer access Almighty God directly. And, this has been the case for a few thousand years. Therefore, the devil has got bugger all to lose. He has to fight tooth and nail to beat God. He has to give it everything he's got. Otherwise - he's got nothing.

Think about it.