Pleading for mercy is not the way in which you should deal with the antichrist, and his demonic cohorts. You have to acknowledge to yourself that if you are sealed and raptured into God's millennial kingdom, if the Messiah has risen from the dead, and already has returned (he has, even if you have not yet seen him in person), then you have already won the battle. You should be commanding victory, not pleading for mercy. You should be saying to the earth, "Jesus is Lord."
Say now to the prognosticators of doom, "Enough!" Say to those with visible demons in their solar plexus, "Enough!" Say to those with invisible demons in their back, their spine, or their head, "Enough!" If you speak with the indwelling Holy Spirit Of God, and ask him what you should do in any specific circumstance, he will never tell you that you should plead for mercy.
The Lord God Almighty El Shaddai