DHT would be the best, since 3 alpha is suppossed to be more active then 5aa or require less of a conversion, that is what makes it a better choice. DHT is illegal to import if I remember correctly.
As for the trans, I am working on it, it takes time when there is so much other stuff going on. Ulitimately I would like to use for my anti -e with 7-OH, I dont think anything else will beat it. Until then though you want to have something with as much as a local effect as possible, even avants absolved should be a good carrier. its local, Gen2 and you could add the 3 alpha to it. almost all carriers have some type of cross over systematic delivery but apply it directly to the site should help.
Ill try and work on it this week and see if I can get some beta bottles done.