i've been planning a dmt ceremony now for about 2 weeks. I was going to incorporate syrian rue into the mix for the first time, but i stupidly took kava today. so now i don't know if i should add the rue tomorrow, you think 24 hours is enough time before i take a dose of syrian rue????

Yes, that's fine. Kavalactones have a half-life of 9 hours and achieve peak plasma levels 1.8 hours after.

Heck there are some on shroomery who take them together, ceromonies just don't recommend it as they want to keep the trips pure.

Though taking them together in large doses might create a potential for interaction unforeseen. If any of them acts on serotonin or epinephrine, that could be dangerous - and since kava is known to have hallucinogenic properties, I'm almost certain of at least some *potential* serotonergic properties; though that's not certain of course. Since kava seems to do something with cholinergic circuits, it may indirectly cause REM rebound or (conversely), potentiate noradrenaline, which may have some risks involved. But if it's over 24 hours you won't have anything to worry about, even after 10-15 hours it would be fine. Plus Rue is a RIMA and only last 3-4 hours

There is also concern regarding liver toxicity, I don't know why kava may be hepatotoxic, but if it inhibits any enzymes, it could shoot drug levels through the roof accidentally.