In general I would try to play it really safe at least until you're lvl 50. I've tried experimenting with multiple alt/junk accounts.. Only 1 of 4 were banned and I think it was bc I completed GB10 or something before I was lvl 50 and no 6* mons. The other accounts I completed up to GB/DB9 etc. with no issues.
I think the speed might matter only for later stages of TOA (not sure, my main can only reach TOAN 50ish right now without the hack). I used the non-VIP version before, so there were less features... But the hack did something weird so if I ran a dungeon, none of the enemies appeared and it looked like my mons we just running through the scenario lol. Anyway, because of that I farmed a lot of dungeons (including scenario in hell mode and up to b9 in all of cairos) in 6 seconds.. using only 1 maxed 5* or 6* mon and the rest fodder.... but those still haven't been banned.
I've also read other forums that use a hack similar ish to this one (or it least it sounds like it, except it's for Android or an emulator) to see what they say about being banned and it seems like speed runs for TOA and completing b10 are the biggest red flags.