By level 71 TG can already farm D2S1 alone probably could have done it a few levels earlier too
Do you use support troops or magic?
The TRUE solo is a Lv 60 druid soloing D2S1 without any magic or troops. Just drop him there and let him do the farming for you.
what ability does your druid have? My druid sometimes dies to executioner or assassin and something else attacking him. Since it isn't 100% success I don't do that often