Not sure what to say because even without such rigorous rules, TWoS is very stable for me and for many others...
Anyway, just keep in mind that
TWoS contains more than 8.000 modified and added files. Adding more files without understanding what each one of them does , will most likely give you less stable game, like yours. Also, certain amount of megamod's functionality will be lost for sure which can mislead and confuse you during your playtrough...