Dermatrest would be the most potent non injectable base you could choose...but it may not exactly be what youre looking for ("something safe and side free"...your words).
Again, potential for significant estrogenic sides and rough recovery. But also potential for stellar gainz (and minimal sides).
You really can't go wrong with any OL transdermal...
OP, there are a couple logs on here where guys are running Dermatr3st and also dosing oral Tr3st preworkout and reporting insane strength gains. If I were to go on an andro run I'd prob do dermatr3st/tr3st/sup3r-1/sup3r-4 (not sure if I'd add the 4, would have to look into it).
If you think about it, why not go big if your fcking with your hormones and taking a risk anyway? Have all your supports, AI, PCT items in place along with a solid diet and you should be fine.
The great thing about AM is that if something goes south or a concern rises up, you got a huge network of knowledgeable fckers to walk you through it...
Also trest is good if your worried about hair loss too from what I've read