By the way, Osgiliath, I agree with you that "parousia" means "presence", not "coming. But what you need to understand is that Christ's "presence" is inseparably tied to His "coming in His kingdom", and that His coming is inseparably tied to His judgment upon Jerusalem! This is made perfectly clear in
Matthew 24:
Jesus left the temple and was going away, when his disciples came to point out to him
the buildings of the temple. But he answered them,
“You see all these, do you not? Truly, I say to you, there will not be left here one stone upon another that will not be thrown down.” Matthew 24:1-2 (ESV)
His statement about the Temple being destroyed prompted them to ask this:
As he sat on the Mount of Olives, the disciples came to him privately, saying, “Tell us, when will these things be, and what will be the sign of your coming
[parousia/presence] and of the close of the age?”
Matthew 24:3 (ESV)
In other words, they asked Him when will the temple be destroyed, and what will be the sign of your presence and the end of the age? Two questions not three, as some wrongly assert (the second question has a single subject - "sign"- and a compound object - "presence" and "end") with both questions dealing with the temple.
Christ then proceeds to tell them throughout the rest of the Olivet Discourse how His "coming" (erchomai) and "presence" (parousia) will happen.
"For just as the lightning comes [erchomai] from the east and flashes even to the west, so will the coming [parousia] of the Son of Man be. "Wherever the corpse is, there the vultures will gather.
Matthew 24:27-28 (NASB)
This last sentence
, "Wherever the corpse is, there the vultures will gather." is the same thing Luke reports Him having said to the disciples in
Luke 17:
"For just like the lightning, when it flashes out of one part of the sky, shines to the other part of the sky, so will the Son of Man be in His day.
Luke 17:24 (NASB)
"And just as it happened in the days of Noah, so it will be also in the days of the Son of Man:
Luke 17:26 (NASB)
Luke then tells us how the flood - God's judgment - destroyed all those not in the ark. He tells us how all those in Sodom and Gomorrah were destroyed by God's judgment. And Luke closes chapter 17 with the same words found in
Matthew 24:28:
And answering they *said to Him, "Where, Lord?" And He said to them, "Where the body
is, there also the vultures will be gathered."
Luke 17:37 (NASB)
The sign of His presence on His throne was His coming in judgment upon Jerusalem, and Jeremiah uses the Hebrew word for "presence" to describe what this judgment means:
I beheld, and, lo, the fruitful place
was a wilderness,
and all the cities thereof were broken down at the presence [pāneh - face, presence] of the LORD, and by his fierce anger. Jeremiah 4:26 (KJV)
The destruction of the cities of Judah prophesied in
Jeremiah 4:26 was fulfilled by Babylon under Nebuchadnezzar.
The sign of the presence [parousia] of Christ on His throne and the end of the Mosaic age was Christ's coming [erchomai] in judgment upon Jerusalem, fulfilled in 70 AD by the armies of Rome.
One last thing:
But Jesus held his peace. And the high priest answered and said unto him, I adjure thee by the living God, that thou tell us whether thou be the Christ, the Son of God. Jesus saith unto him, Thou hast said: nevertheless I say unto you,
Hereafter shall ye see [optanomai - "appear"] the Son of man sitting on the right hand of power, and coming [erchomai] in the clouds of heaven. Matthew 26:63-64 (KJV)
A better translation of this might be:
"I say to you hereafter shall appear [optanomai] the Son of Man sitting on the right hand of power and coming [erchomai] on the clouds of heaven."
"Coming on the clouds" is a phrase used in the Old Testament to describe God's coming in judgment upon a nation, as in
Isaiah 19:1:
The oracle concerning Egypt.
Behold, the LORD is riding on a swift cloud and is about to come to Egypt; The idols of Egypt will tremble at His presence, And the heart of the Egyptians will melt within them.
Isaiah 19:1 (NASB)
Your source's "six words" all connote different things but all point to the same event: the presence [parousia] of Christ on His throne coming [erchomai] in judgment upon Jerusalem, just as the Lord did in the OT.
The sign of His presence and the end of the age appeared with His coming in judgment upon Jerusalem.