Just for anyone interested:
Based on what I've seen from numerous experiments, these are the settings I would recommend (any corrections are appreciated):
Campaign:
Settings
do not matter, no matter how crazy you make it, you will never get an "
unknown error detected"
Solo Raids:
The settings I personally use are stupid enemy, no tag cd, and my multipliers range from 10-50. Usually I start out at 10x, then increase to 50 at max, and at 10-30 seconds until the battle is over, I switch back to 10x. So far I have not had an "
unknown error detected" so I can recommend these settings. As for 50x+, there is very little chance of not getting "
unknown error detected", so don't even waste your time.
I actually wouldn't recommend going above 30-40x in solo raids because getting at least some damage off is better than getting none off and losing an attack.
Also, I'd like to add that this isn't for sure, but I've found that when I start the raid with 10x and end the game with 10x, I've had no "
unknown error detected" except when I was using a 50x+ multiplier during the raid.
League Raids:
Same as solo raids, but I wouldn't recommend going as all-out as in solo raids, seeing as other people are involved and your league could be different than mine.
Story:
Anything goes.
Character Battles/Misc:
Anything goes.
Have fun out there, and feel free to add your own experiences if yours differed from mine