Everything listed below has not gotten me banned (so far) including mixes of one hit kills, enemy doesn't attack, and attack multiplier for 5 months;
Act 1
Act 2
Act 3
Act 4
Act 5
Act 6.1
Act 6.2 (6.3 and 6.4 seem a little too risky, tested on multiple accounts)
Event/Side Quests
Daily Quests
Variants and Classics
Special Quests;
Road to Labyrinth
Realm of Legends (do this every other week with hacks to dodge bans)
(side note, avoid doing Abyss of Legends as I have been banned many times using hacks through this but Labyrinth seems a bit iffy and needs more testing)
Feel free to discuss with me your strategies on what you can do without getting a ban, as I will update this list from time to time and still have to get through 6.4 and 7.1 without being banned