Here I sit in a serenade of glory!
Well, let's seeAlexander the Great, Mother Russia. They actually skip closers fairly frequently.
I do not disagree with you but out of 16 albums Steve did 10 closing songs and they played 8 of them on the respective tour.
And to be honest I think they did not do Alexander or Mother Russia due to the political climate concerning the Macedonia issue and the Russia split.
I guess one could argue that then they would have not written these songs to begin with.
Last songs on each album
1) Iron Maiden - Iron Maiden
4) To tame a land
7) only the good die young
9) Fear of the Dark
10) The unbeliever