Great, so when does Christ award the overcoming saint of reigning over the nations?
revelation 2:25 But that which ye have already hold fast till I come. And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:
Let's start with the Scripture you presented here. Next let's add some of the following from a parable in Luke 19.
Luke 19:12 He said therefore, A certain nobleman went into a far country to receive for himself a kingdom, and to return.
13 And he called his ten servants, and delivered them ten pounds, and said unto them, Occupy till I come.
Luke 19:15 And it came to pass, that when he was returned, having received the kingdom, then he commanded these servants to be called unto him, to whom he had given the money, that he might know how much every man had gained by trading.
16 Then came the first, saying, Lord, thy pound hath gained ten pounds.
17 And he said unto him, Well, thou good servant: because thou hast been faithful in a very little, have thou authority over ten cities.
It's usually agreed by pretty much everyone except maybe extreme Preterists, that A certain nobleman is meaning Christ. Went into a far country to receive for himself a kingdom, this is involving His ascension back into heaven where He is currently still in heaven. And that this--and to return--is meaning His bodily return to earth in the end of this age.
If we look at verse 15 we see that He has returned. If we look at verse 17 we see that one of these servants is rewarded with having authority over 10 cities. What is that all about and why would this be something one is rewarded with after He has returned? Per Amil there is no one left after He has returned other than saved saints that have put on bodily immortality. Whatever it means to have authority over ten cities, how could this possibly be relevant unless these cities still consist of mortals?
This parable tends to fit Premil and certainly not Amil. Could having authority over cities be the same as having power over the nations? I don't know for certain since I'm not entirety sure what is meant by having authority over ten cities, or five cities, etc.
What I am certain about is, that He has to bodily return first in order to even give anyone authority over cities. What I'm also certain about, this makes zero sense if everyone are in immortal bodies and no one but the saved are on the earth at the time. That's not the picture Zechariah 14:16-19 paints, though. The ones who might not come up, thus can be punished for not complying, couldn't possibly be meaning the saved who have put on bodily immortality at the 2nd coming. That seems to fit ruling them with a rod of iron, where the passage you brought up that I started with in this post, that too involves ruling them with a rod of iron, and that this power is also being given to overcomers.
How does any of this add up to Amil? That I will never figure out since most of it comes off as nonsensical if it's supposed to support Amil somehow, even if literal cities are not meant, though I don't see how they couldn't be since nations do involve cities. Why would immortals need to have authority over cities where other immortals are living? Why would immortals even be living in other cities to begin with? Why wouldn't they be living in the city that comes down from God out of heaven instead? Even Revelation 21-22 shows that there are still nations outside of the new Jerusalem.