Okay okay, I get what you're trying to say Lennox. If we had to conquer the world as macros, how would we plan it to go as smoothly as possible, regardless of all the definitions of 'smooth'.
The main concern would be maintaining the spoils as long as possible. Regardless as to whether humans are food, or slave labor, or even a pest species to wipe out, the last thing you want is the world a wasteland when you get it. Rule one - prevent or at least limit the use of nukes.
If the powers that be realized giant monsters were attacking, they might just fly in a few tactical firecrackers. Surprise and anonymity is your friend. You cannot destroy what you do not know.
Here's what I'd do. The first goal would be to destroy as much of the power infrastructure as possible, trying to black out everything. Sure, planes will crash and cars will too, but those are small potatoes. The attack would begin on the dark side of the planet, with the night as your ally.
When everything goes black, the gov't will instantly have their hands full - looting, man's age-old friend. They'll be so busy trying to restore order and find out who 'blew up' the power plants and transformer stations, they wouldn't be looking for giant monsters. Word would be so hard to get out and so scattered, it would dissapear into the backround of imagined soviet invasions and martian warmachines.
Once the powergrid is sufficiently down, the military and naval bases are next. Go in there and smash as much as possible as fast as possible, prevent the plans from getting aloft and avoid the ones that already are.
Sattelites can pose a problem, but without power how can one recieve or read their data? Only a fraction of birds up there have radar imaging, and not all of those can see though clouds. Another reason to attack at night. Waiting for the weather wouldn't be practical on the grand scale, but hey, its something to keep in mind.
Once the military instillations are taken out (ones with nuclear missiles first), the job is mostly done on that front. I'm not up to snuff with military protocol, so Im not sure which would be better: taking out outlying bases first and central command last, or the other way around.
With that taken care of, the job is only half done. Theres still another half of the globe with power and daylight. You could take them out in a rolling attack that follows sunset, but that might alert some nations that whatever it is, its coming for them and they could react poorly. Invading an historical rival, for instance.
Or you could wait until that half of the globe makes it into darkness and attack all at once like before, but that too has risks. Once the devastated half reaches daylight, word and details might reach the functioning half about just what is going on....or how weakened their neighbors are. Human beings are oppurtunisitic bastards after all - that too might kick off war.
Id call it an even shot either way, but I'd go with the rolling attack. Speed is your friend. Once the major nations of the world are toppled and their infrastructure smashed, the smaller and weaker nations can be taken at leisure.
The navies and submarines are always a problem, and without aquatic macros might just ruin the whole endeavor. It only takes a few nukes to trash a large, large area. All you could do is pray they don't get trigger happy and break protocall (again, I'm not sure if its physically possible to launch missiles without codes or something, and I doubt I could find out about russian or chinese boomers. Anyones guess)
After that...its just a matter of how you want to rule the globe and what to do with the little guy.
That more of what you were asking, lennox?
Z. Zorin