OK, so having read 景元/雨别 fic (yes, I'm desperate), I now want a fic where all the incarnations of 饮月 (at least those starting from 雨别) have a unrequited thing for 景元 and are all jealous of 丹枫 because he's the one that got the guy.
The reason I want this is two fold:
Vidyadhara falls in love with the same person if said person is met. It could just be this one guy, or it could be due to Vidyadhara might have different identities, but their core personality remains the same, so they'll keep falling for the same type of person. This "jealous of previous incarnation" trope is awesome and I want to see it happen with 饮月君.
If this wiki record is trustworthy (big if), then it seems 龙尊 is doomed to fall into 龙狂. I recall there was also a mention of 龙心 in some dialogue at some point and that said 龙心 has to do with the 龙狂 problem. I would like to work this stuff into the reincarnation soulmate trope.
So.
What if, for whatever timey-wimey reason, 雨别 meets up with an accidentally time-traveling 景元 (even better if this is post-Sedition), and basically falls for him. The reason being that 龙心 sees the guy and is like "YES". But, because 景元 is from the future, he doesn't stay long enough for the relationship to actually go anywhere and the unrequited feelings 雨别 develops slowly drives him into 龙狂, so he has to be forced to reincarnate. That timey-wimey accidental infatuation, being stuck in 龙心, gets passed down through each reincarnation until 丹枫. But since 龙尊 has fragmented memories of the past incarnations, 丹枫 is unsure how much of this is him liking 景元 and how much of it is 龙心, so he's super not willing to admit he likes the guy.
Meanwhile, 景元, who at this point hasn't gone through the timey-wimey process, is basically just being friends and growing close and starts to develop feefees for 丹枫. But since they have very different social positions, 景元 has accepted that he can only admire 丹枫 from afar and be a good friend. A romantic relationship is definitely out of the question. This mutually unrequited thing goes on a bit until, like previous incarnations, 丹枫 succums to 龙狂, puts everyone in danger, 白珩 sacrifices herself to save everyone, 饮月之乱 happens, and 景元 is basically alone, having to clean up the mess. After 丹枫's forced 蜕麟 ritutual and turns into an egg, 景元's immense loneliness plus his newly given ridiculous godly summoning powers, plus whatever Permanence powers that's been brewing inside 饮月君 all reach a harmonic resonance through magic-vibes sends 景元 into the past to kick start all this.
Then 景元 gets back into the correct time point, realizes "oops" and decides OK, fuck it, he has to end this cycle somehow. And the key here is, according to 景元 logic, is because 龙心 is very lonely due to the 龙尊 position. If 饮月 can just meet up with people who treat him as a friend and equal more often, then he wouldn't be so hung up on the first person who showed him friendship with no strings attached. So begins 景元's long political negotiations to get 丹恒 out of prison to go meet up with other people and hopefully fall in love with someone else in his travels through the universe and end the tragic cycle mess.
丹恒 may or may not be entirely cooperative with this grand plan. Probably not cooperative. But he's a tsundere who has a hard time expressing his feefees, so more miscommunication happens. 景元 thinks he's got everything fixed, while 丹恒 is pining away and in denial.
...Somehow this gets fixed and feelings are reciprocated, 龙心 is appeased, 皆大欢喜!