Make a folder in your Windower\addons called SCH-hud and put this lua and the assets folder in there. Load this addon with main job SCH by adding send_command('lua l sch-hud') to your Gearswap.
The book will turn purple if you have Dark Arts enabled, and will glow purple if you activate Addenum: Black. The book will turn white if you have Light Arts enabled, and glow white if you active Addendum: White.
The left page displays the number of Stratagems you have available. If you have used any stratagems, the right page will count down until the next stratagem refresh.
Addendum: Black
Addendum:White