1st Thessalonians 4:16, 17
"For the Lord Himself shall descend from heaven with a SHOUT,  with the VOICE of the
archangel, and with the TRUMP of GOD,and the dead IN CHRIST shall rise first:
(as in shall FIRST rise)  THEN (as in RIGHT THEN!)
WE which are alive & remain (as in those who were NOT
dead) shall be CAUGHT UP TOGETHER
WITH THEM, in the clouds, to meet the Lord in the
air: and so shall WE  (as in BOTH groups) ever be with
the Lord."
And read 1 Corinthians 15:52 " In a Moment, in the
the twinkling of an eye, AT the last TRUMP;...."
the rest of this verse includes BOTH groups.
There is NO basis for believing the still living PART of
the bride are left behind to preach & help!  The preaching
is done by the two witnesses (from of old) sent back; and
the two angels from above; and the 144,000 (which are'nt
part of the church, but from 12 tribes of Israel).