(7) And when they shall have finished their testimony, the beast that ascendeth out of the bottomless pit shall make war against them, and shall overcome them, and kill them.
This verse does not say at that point Satan will ascend from the pit.
John is making reference to Satan, that will not even be addressed until a later point.
You have the 2 chronologically dead way before Satan is even said to ascend out of the pit.
The fact is that the pit was opened in the 5th Trumpet, and Satan could come and go at any time. Satan was not bound even in Amil reasoning after the 5th Trumpet.
Of course Amil have it backwards. The pit was opened and then later Satan was sealed inside. Amil think that the pit was locked first, and then opened.
No one knows when the angels were locked in the pit, but Satan was always free to come and go. Satan did not need the pit opened. But now that Satan's front door was opened wide, humans could see him come and go constantly.
This verse does not say will ascend, has ascended, nor even ascended just for the purpose to kill these 2.
The words "that ascendeth" is an ongoing phenomenon.
The other place mentined is when Satan comes out of the earth in Revelation 13:11
"And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon."
This is the only other reference of ascending.
The last place is a future tense action, which had already happened as mentioned twice before.
"The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit."
Evidently the 2 would die after this point. After Satan had been the 8th kingdom.