Here´s my include list, I´m using A8.10:

/////////////////////////////
#include <acknex.h>
#include <default.c>
/////////////////////////////
#include "defines.c"
#include "windows.h"
#include "d3d9.h"
#include "meshes.c"
#include "sounds.c"
#include "effects.c"
#include "buildings.c"
#include "menu.c"
#include "bmaps.c"
#include "enemies.c"


default.c will be excluded on release.
windows.h is stripped down to 30 lines.
The biggest library is d3d9 atm.
Atm I´m at 198 kb code, compiled it´s 246 kb.
I´ve room left, because I´ve some repetiton in my code.