Ok, I can confirm that setting my CSS to
resulted in it switching away rats and pigeons while killing everything else in gingertown with a saucegeyser.
[ gingerbread ]
[ gingerbread pigeon ]
[ gingerbread rat ]
However it was using at most 1 macrometeorite per adv. So with some strange luck it might be possible to not use them all up. (eg, if 18 sewer turns are 13 gators + 5 rats that turn into pigeons when used on. A human would use macro a second time during the rat->pigeon adventures, the script won't; but the odds of this happening are relatively low)
Also, I was under the impression advancing time only lost you a single adventure, and could then do 15 at night to compensate. But no, it actually removes those 5 adventures from your daily limit. So, I am disabling it now.