Some believe that snatching away will happen mid-trib. There is a strong case to be made and made by scholars more wise than us, that the Bride will be removed before the Man of Sin emerges to make treaty with Israel of a seven year compact. It may be related to the Psalm 83 war, which will be between Ishmael descendant Islam and Israel. The war that is titled 'armageddon' is between Israel and gog and magog, not Ishmael descendant Islamic powers.
Saving souls will continue during the Tribulation. The Holy Spirit indwelling will no longer be happening since that is a characteristic of the Bride being prepared for The Bridegroom, but He will be putting the HS seal on untold millions who bow their knee during the Tribulation.
“Holy Spirit indwelling will no longer”
I’m not so sure of that. The Spirit renews the inner man day by day and if one is a Christian that is the process by which we are renewed. The Holy Spirit ,if he is the Restrainer, can certainly step out of the way, but still be with “TRIB saints” if the scenarios occur that way! Christ says of his children that he will never leave or for-sake them. The Bible talks about “sealing of the Saints” at some point during this challenging period. I don’t think the Holy Spirit abandons any of his children to their own devices, even if his activity is minimized in the greater world at that time. They will not be able to withstand Satan’s temptations otherwise.
I’m reminded of the story of Saul who appeared at Gibeah with the prophets and as they sacrificed, the Holy Spirit fell on them(1Samuel 10) ...yes it did happen in the Old testament. It may very well manifest that directly in the Trib times but since Jesus had already died and arisen...it won’t be a mere “falling upon but indwelling”. These Christians are going to need much more power to withstand the times. I can’t find anywhere supported that the Holy Spirit won’t support Christians who become so during the Trib period, assuming the “pre-trib’ scenario! His support may be more “Old testament” perhaps, but I suspect because of the cross, He will indwell them as well!