Personally i will simply follow the normal routine stuff though, i've just tested it out as normally, did a normal act 1 run, got to bone ash (inner closter), level 12. I think i will focus on doing a few bone ash runs at reset, i mean just 4-5, he alwys drops loot, i've found some good stuff from him before. But not staying long. Get good exp too there. But when playing a build like mine, one cannot stay and grind, deals not that much damage as comparet to cookie sorted builds, so i must try to press on. Was lucky enough to find arctic snow build belt, it's a nice one, though only 8 slots. But good cold resist.
I probably will not be doing tombruns, i will try to press on through act 3. Maybe do some travincal runs. Get good exp there, n my build is specialized to one on one battles.
I don't think i will be doing quest bugged runs, which is a huge risk. Did some gambling, and actually found some cool javelins n such... gambling can b good... will try to collect stuff n sell it ...
Simply just to try to advance, n not get stuck. That is the plan.I mean in early nightmare, you get crazy good exp even at level 30. I will just do it that way. It will be interesting.
Nice, just thinking, I guess it would be good to do some old school Trist runs @ level 10 ... as for Den, should get to level 6 to get better Experience gain if I remember correctly, and of course I like the Scroll boss, forgot name of them by the Tree and as you stated Bone Ash, quick and simple since WP is right there... normally do him @ level 15+ and of course Andy runs to hit 30 before Act 2... I don't rush to Nightmare, so Act 2 to Act 5 without re-runs is simpler for me, I am normally 45 by the time I get to like Arreat Summit in Normal.
but then, it has been a long time since I played that way.
Good luck and have fun.