My apology for not responding sooner. Hopefully these settings are of some help. Maybe others can suggest corrections, etc. for next year.
In Christ,
Rdr. Michael
Attached is my own contribution; I hope to post the Aposticha Idiomela in a little while (I'm finishing them now).
I've included two settings for the first idiomelon - one as a simple sticheron idiomelon, and the other with some longer theseis as a doxastikon "proper". I wrote the doxastikon setting afterward, and, in light of that setting, I would probably have actually chosen the "alternate" lines in the first one setting to be used in the short version, and the ones that are actually written in the main body text of the first idiomelon for the doxastikon (which I did).
Michael, I like some of your lines... for instance, "for the head of the Forerunner" in the first idiomelon. In general, I do my own work first, to "put the effort in", so to speak, but I do like to look at yours for comparison, as you often come up with a line that I hadn't thought of. I also like the "O Lord, by the intercessions" in the final idiomelon; I had some trouble with that line and I like your solution better. My only suggestion would be a way to augment the end a little bit, to draw out "intercessions" only slightly more.
In Christ,
Gabriel
EDIT: I have added the Idiomela at the Aposticha. Many years to everyone... may Saint John pray for us.