Narshe's map and battle overhaul project

You can get around the map NPC limit with a few tricks. Mainly, you can add a subroutine to the entrance event that runs only during the Kefka at Narshe event (between scenarios completed event flag and Kefka defeated event flag) wherein you reposition all the town NPCs with 'wait until complete' action queues, change their graphics and palettes to that of soldiers with event commands 37 and 43, and change their event address with event command 7A. That's what I did to recycle the Select a Scenario screen without moving a single NPC.

Code:

CA34D7: {37-11-06}            Assign graphics $06 to object $11 (NPC 1)
CA34DA: {43-11-00}            Assign palette $00 to character $11 (NPC 1)
CA34DD: {37-10-08}            Assign graphics $08 to object $10 (NPC 0)
CA34E0: {43-10-03}            Assign palette $03 to character $10 (NPC 0)
CA34E3: {7A-10-C5-35-00}      Change event address for object $10 to address $CA35C5
CA34E8: {7A-11-3A-35-00}      Change event address for object $11 to address $CA353A
CA34ED: {7A-13-81-35-00}      Change event address for object $13 to address $CA3581

You'll have to get comfortable doing something like that anyway because the tower defense scenarios work by having the soldiers walk a set path until they reach the end of their route, wherein they run game over code. An ambitious project but a very clever idea, I wish you luck.

P.S., make sure you update Lone Wolf's routing too.