It would make more sense if you could see that the book is not in chronological order.
Instead, it is a series of overlapping visions.
The end is found in Revelation 11:15-18, with the 7th trumpet, which is the last trumpet in the Bible, and "the time of the judgment of the dead", with "reward" for some and "destruction" for others.
Chapter 12 begins with a review of Church history including the fall of Satan and the birth and death of the "man-child", who is Christ.
The Second Coming is also found at the end of chapter 6, and the "harvest" of chapter 14, and Revelation 16:15-16, and chapter 19.
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Haven't I indicated to you and others in the past, that I don't see the book of Revelation chronological from start to finish to begin with? Yet it is a contradiction if the 2W testify during the 42 month reign of the beast, but that the beast does not make war against them. It is only during the 42 month reign of the beast that the saints are made war with and overcome.
Revelation 11:7 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.
Obviously then, this sees it's fulfillment in Revelation 13 during the 42 month reign of the beast. The beast only reigns 42 months. The beast does not continue to wage war and overcome anyone post this 42 months. If when the 2W testify, that this runs parallel to the 42 month reign in Revelation 13, that would place this part---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---being fulfilled outside of this 42 months. Nowhere in Revelation 13 does it ever say the beast makes war and overcomes someone, outside of this 42 months.
Revelation 13:4 And they worshipped the dragon which gave power unto the beast: and they worshipped the beast, saying, Who is like unto the beast? who is able to make war with him?
5 And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.
Revelation 13:7 And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations.
The text indicates power was given unto him to continue forty and two months. 42 months and an extra day or two, or an extra week, or an extra month, that does not equal 42 months. That equals more than 42 months.
What I do then, which contradicts what you said of me----"It would make more sense if you could see that the book is not in chronological order."----I tend to conclude that the 2W are killed at the tail end of the 42 month reign of the beast in chapter 13, which then at that time leads to the 7th trumpet. And not that the 7th trumpet sounds first, followed then by the 42 month reign of the beast, as some tend to conclude. The 42 month reign of the beast precedes the sounding of the 7th trumpet, as does the 42 month testifying of the 2W, except like I pointed out already, these two 42 month periods don't run at the same time. IOW two 42 month periods totaling 7 years in all.