Then there’s the whole issue of the 144,000 with 12,000 from every tribe sold out to their Messiah and doing great exploits for Him in the END TIMES.
Actually there is nothing mentioned about 'selling out', regarding the 144,000. Revelation 7:3 Saying, "hurt not the earth, neither the sea, nor the trees, till we have *sealed* the servants of our God in their foreheads". (4) And I heard the number of them which were sealed: and there were sealed an hundred and forty and four thousand of all the tribes of the children of Israel.
Notice now that verb used 'were', and John wrote this when? Paul refers this to predestination before the 'foundation' of this age. Ephesians 1:4.
And notice that there are two tribes by name not named, Dan and Ephraim, but nothing mentioned about every tribe sold out to their Messiah.
There are 7 seals listed, along with 7 trumps, and 7 vials.... check out the sixth one of each and you will have that '666' that is either 'sealed' in the mind or hidden from the majority.