I don't see the point of any of this. Larian made a poor job of implementing RNG then made it worse by introducing Karmic dice (the actual meaning of karmic has nothing to do with this context BTW). None of the other games I've played have this problem only BG3.

I play with Karmic dice turned off and don't have a problem hitting anything. Sure my party sometimes miss but they hit far more often. I play on normal and my level 7 party has Lae'zel and Karlach on +7 and +8 or +8 and +9 to hit (might be Karlach and Lae'zel). There again, I use mods so my party's stats are what they would be if I built the class.
All my party is either AC 19 or 20 so they they avoid getting hit more often than they get hit.