From testing, there are instant bans on certain criteria. Usually low level/power accounts going above a certain boundary. Like if you would normally only be doing 1 damage to enemies, but clear the level. There is a potential that your account gets flagged just from using the mod, like Dx2 for example. Dumb enemies seem to be the "safest" so far, but I have still received bans from using it on accounts through Simulation and Campaign.
Intercept has been very weird. I'll have some accounts received bans through it using atk and Def mods, but dumb enemies have been fine for the most part.
All of this would be for naught, though if they mark your account like Dx2 just for having it installed. I have yet to see a true ban wave that affects all the modded accounts, but always be under assumption that one could come.
I'm also a broken record when I say; Use the mods at your own risk. It is VERY easy to recieve a ban, and even "safe" methods can still get a ban. If you're a long ways in, I'd tell you not to use them and progress on your own.