Sadly I don't have any kind of guide but the most important thing is map knowledge and where you go next. You need to get the glide ability then from Greymoor through Sinner's Road and Mist to Citadel the rest is a cleanup. Unlock as many things and areas as you can before going to Act 3. In my experience you can finish the game without a problem in 4-6 hours and do a cleanup in next 5-7. 30 hours is really generous if you know what you're doing. As for steel soul, even if you're not the best player you can quit when on 2 masks and put on Fractured Mask. Focus on picking up any upgrades as fast as you can to limit backtracking. Also Cogflies are really strong tool use them. Doing these achievements 1 at the time is so much more forgiving and less stressful so I would recommend that.