Sorry, no verses were found that say, "Immediately BEFORE the tribulation of those days...will he gather together his elect."  

See "After"

Sorry, no verses were found that say, "The antichrist will be revealed AFTER Jesus comes".   There was a verse found that says, "antichrist is revealed BEFORE Jesus arrives".  Please consult a bible or lower link.

See "at" 

Sorry, no verses were found that say, "The WHEAT are gathered first in the harvest."   The Lamb of God speaks contrary to the 'Man of God' and demands that the TARES be gathered first and burned.  Lastly, the righteous will shine forth as the sun.

See  "First"