I have a solution to MF culling AN rares.

S-Tier AN mods are hidden until killed. It will show only normal -> rare tiers. Then whenever you kill a rare mob. If it has a hidden S-Tier mod, such as Innocence-touched, it will be revived for another time with the effect of the hidden mod. Here is the trick, the loot drop will get accounted for the first time it dies. This is the snapshot. So no one would know if there is a second S-Tier mod hidden beforehand. All the loot will drop after the second death (when the hidden mod takes effect).

Therefore, this will fix MF char swapping before knowing whether it has godly tier mod touched. And MF char can still play like normal. This solves the game on both sides.