I've read numbers 1 and 4 before; I think #1 is also by Nherizu-- http://www.fanfiction.net/s/6571580/1/Vermilion_Kaleidoscope ? I've also come across a few fics like #6, but I tend to run screaming in the other direction when it come to mpreg (both because of my personal distaste for the tropes involved and because the OC kids tend to be overly Suish and monopolise the story, and if I wanted to read about original characters I'd be on Fictionpress not ff.n) so I never read any of them all the way through; off the top of my head, the only thing I can think of is an older, longer fic by DnKS-girlS or however she capitalises her name: http://www.fanfiction.net/s/2951234/1/Shattered_Innocence