the reality is that rdis are actually not all that useful in terms of understanding how your body processes nutrients. i built my diet around them as they're the best thing we've got, but it's important to understand how they're deficient.
your body will remove essentially all water soluble vitamins from your body in something like 6 hours, so taking a 500% dose of b1 is only useful if you can't absorb it. whether you take 3 mg or 300 mg of water soluble nutrients, you piss it out in well under 24 hours and should consequently take more in less than 24 hours. with a b complex, the best thing to do is take one every 12 hours, or half of one every 12 hours. that's why i take the c in four small doses - i'm trying to maintain constant c levels. you can't absorb 250 mg of c even, taking 1000 mg is utterly pointless, unless you need that much to absorb 100 mg.
with fat soluble vitamins, your body doesn't use them at all, it stores them. when you take any amount of a, e, d or k, your body metabolizes those vitamins by storing them, and then accesses them from storage. so, how much fat soluble vitamin you have in your blood is determined autonomously, by your body, as it pulls it out of your liver and pancreas. d that you generate by sunlight is used in real time. but the idea of an rdi for fat soluble vitamins is not coherent, then, as your goal is trying to max out the storage in your liver. you can't increase serum a, e, d or k via your diet, you can only increase your stores. that's why low fat soluble vitamins are often caused by retrieval issues (like a damaged liver or a genetic enzyme deficiency) rather than dietary deficiency.
that doesn't mean you shouldn't try to meet the rdis, but with fat soluble it's probably too much
(if you don't have a determined deficiency) and with water soluble it's probably half of what you need over 24 hours, and you should probably aim to meet the rdis every single meal rather than every day. they should be reinterpreted as recommended single meal intakes, not rdis. you should get 100-200% of the rdi for b1, b2, b3, b5, b6, b7, b9, b12, inositol, choline, c and most minerals except iron and calcium, respectively, at every single meal, not cumulatively every day.