As an example for where other traits are better than Aversion, I had an earlier run that used Mobile Dungeon and spent 2 early loop days training an Aversion Undead to get a bunch of EE and something like 40-50G of angst on the chosen to set up for other forsaken to do the rest.
In that case, the Aversion trait is fairly pointless compared to the Megalomaniac one which gives double damage when only 1 chosen is surrounded (I believe the wiki still has that and the despair trait swapped) since getting chosen above 1G angst is achieved a different way.
I personally prefer having bonuses which don't have a particular conditions for there uses (In your example you need to have Mobile dungeon). With Aversoon trait you get:
-Starting base damage bonus which also helps with Devil chosen.
-Starting energy bonus if you get pre-broken chosen(Pretty common). Even more helpful if you don't sacrifice forsaken or don't have low cost undead forsaken to start things off.
-Free negotiations in every loop as long you get the breaks.
-Helps with keeping up ee generation against Angel chosen in case you are having trouble with that.
Well in the end I think we both agree on this though. In most normal playthroughs with item rng it's better to pick the most consistent buff. Unless you are going for some role playing.
Negotiation and Despair I can't really think of any uses that wouldn't likely just work out under one of the other traits but those are the easiest ways to permanently defeat Reign so maybe that's their use?
I can't remember if it was actually stated but I think that eventually the campaign will play out differently depending on how you corrupt Reign, among other decisions.
I think the despair trait might have been made for the old despair condition. Weird that it hasn't been reworked. Tbh as long as you get a t3 break first most distortions are easy to trigger. T3 Innocence for Temptation. T3 Morality for both Rampage and Aversion.Megalmaniac just requires you to get conditions then break her partners instead.
Reign is kinda weird to me. She is supposed to be a reoccurring boss but because of how she works it's much more easier to just get her loop 7.
Before her description used to say that she would need level 2 in a circumstance to do t3 action which made sense because I thought you weren't supposed to beat her this early but now because she does it at level 1 it's actually even easier to beat her with a distortion at loop 7 while getting like 5 breaks + distortion. Hopefully you will get a really good bonus for beating her on her last appearance but would you even need it at that point?
My usual go-to for Reign is to rarely let her use the T3 moves until the loop is won, and then use the remaining days on purposefully grinding up the tally. For MOR and DIG, I find quantity is better, staggering the chosen's surrounds so that only 1 is targeted each use of the move. That lets you get a decent number of uses each fight.
Confidence's Detonate move I haven't found an easy way to raise it other than waste days getting a tiny increase. I haven't thought of another option to get INJU up to a high level without using a commander that's susceptible to the move.
It might be because I just forgot to maneuver once and she didn't get level 1 hate but I remember that Reign didn't use her Slaughter when only one chosen was surrounded and only used it when both were. Could be wrong here though.
Okay I am kinda dumb. I forgot that her detonate trigger conditon is inju level 1 and not "x turn till detonate" which means no maneuvering allowed with Inju in combat style. Seems like getting a t4 confidence break at loop 7 is probably impossible. Though if you can somehow get enough breaks in only loop 7 then it might be possible to get more than 3% a day increase in loop 14.