You do realise that nm andarial can drop soj - this has been proven, I'm 100% sure about this - and that clvl doesn't matter for any drop anywhere.soj cant drop at nm andariel id say nm mef.. with mid lvl char, has worked for me several times.. also cowlvl with high mf midlvl char, and cs-runs.
It didn't work in 1.09. It's pre 1.09there is another guide, cant find it atm, it says simething similar to
'only one of each unique can exist in a game at a time
(if you bring one of each of the other uniqe rings, nagel, manald, dwarf star, raven frost, bk, carrion, peace, and wisp. the only unique ring that will drop is a soj)'
which worked in 1.09 iirc (bk and later are 1.10 rings), but not in 1.10+
in 1.10+ only one of each uniqe can drop in a game (no 2 of the same uniqe will drop in the same game, they will be failed uniques)