Tried a new script I wrote and it worked. I'll also upload it to the downloads section.
//disable armageddon for all players
scenario {
run_once {
disable_type("armageddon");
print_game_msg("The armageddon clock has been disabled");
}
//Main script body.
set_timer("no armageddon clock",900);
if(timer_expired("no armageddon clock")){
disable_type("armageddon");
print_game_msg("15 min. Armageddon disabled");
}
set_timer("NoA",600);
if(timer_expired("NoA")){
disable_type("armageddon");
print_game_msg("10 min. Armageddon disabled");
}
set_timer("no clock",300);
if(timer_expired("no clock")){
disable_type("armageddon");
print_game_msg("5 min. Armageddon disabled");
}
}