Hey, i think if you had maybe 25k more archers and the npc is close just send an attack of 95k archers
1kwar
500 pikemen
500 swordmen
500 scouts
and 2k trans with a hero over 150att and a corslet and ivory horn on. i think that should do the job. i'v done it with that. and after you get all the def out of the way just send waves of 25k archers and do so till captured.