1. Tribulation (thilipsis) and wrath (orge) are two entirely different animals with two different applications. The great tribulation is applicable and applied unto ALL and everyone will endure it including the saved and the lost. Through MUCH tribulation we must enter the kingdom JESUS SAID. Wrath is the fiery indignation of God and is applied unto the lost who will face it under the banner of the beast and his kingdom, Israel will go thru it all and be preserved during the wrath. A multitude of scripture in conetxt proves all of this.
By this, I surmise you are a Amilenniial with a Post-trib flair for good measure.
2. The last trump is the last trump. At it we find 3 things....The Lord seizes all earthly kingdoms as LORD, as Christ he resurrect/changes and then rewards the saints, prophets and those who fear God young and old, as God he pours out his wrath upon those who are actively destroying the earth. JESUS is LORD, CHRIST and GOD and PETER and PAUL have tied ALL three days together as one and that one day commences at the LAST TRUMP.
3. A Grandsville Sharp is used in Greek and equates to the following....Paul 2nd Thessalonians 2. We beseech you brethren by the Parousia (Body presence/coming) of JESUS, THAT IS TO SAY OUR GATHERING TOGETHER UNTO HIM.......The GATHERING together of the SAINTS unto Christ is the COMING of JESUS (Parousia-->BODY PRESENCE) AND PAUL lists two things that MUST take place first in this context. THE MAN of SIN being revealed and the apo-hystamie from the truth (apostasy) JESUS WILL NOT COME until these two take place (amongst other thing as well)
4. At the sounding of the 7th trump in Revelation two things are also mentioned....the Mystery should be finished I.E> the resurrection/change and TIME shall be no more which has numerous applications.....as applied unto the saved, lost, world, kingdom of the beast etc. For the saved we are transformed or resurrected in our eternal bodies, for the lost wrath, for the Kingdoms of the world all gentile rule ends, for the beast and his kingdom wrath.......
No, Babylon is not a mystery when all the facts are taken into account....it is woven in with classical Babylon, has 80 characteristics found in 7-8 books and about 13 chapters....10.5 billion to 1 when the math is done....It was a Mystery to JOHN when he wrote Revelation and John knew full well about Rome.