Like I’ve said in the other thread, in probably 20 times as many words, you need to invest 0 time in the questline to kill the bosses and get their insanely good items.
Also Classic is going to be much easier than Vanilla was, there’s no need to have even more easy-to-get gear early on. And no, a 45-minute Strath run isn’t hard by any means if your group is competent.