I have seen or heard every grammar point on Bunpro in media or in real life, barring a handful of N1 points but I will also presumably see those at some point as well. The higher up the levels you go the more written or formal grammar is taught. Everything on Bunpro is easily understandable for an educated native Japanese speaker. They just aren’t sure what Bunpro is testing for and don’t have the context that a normal user would so will normally revert to the simplest way of answering.
N5-N4 are basics and pretty much include no written language exclusive things. There’s some polite/formal stuff but it’s all extremely common in the spoken language.
N3 is still all extremely common although some things you’ll see more in writing perhaps however basically everything is used in the spoken language still.
N2 is mostly fairly common stuff. There are bits and pieces I’ve only seen in the written language I think but a large chunk is commonly used in the spoken language.
N1 actually has some things that really are firmly pretty much exclusively used in the written language. Having said that, lots of stuff is also used in the spoken language but the occasion for it is rarer. The main difficulty of N1 grammar is knowing when it should be used and what the nuance is compared to a simpler turn of phrase.
As I said, all the grammar is actually used but I do personally think a “basic conversation fast track” or something would be an interesting idea. Tae Kim’s guide is aimed roughly at that kind of thing so perhaps try the Tae Kim path, although I think it’s better to just stick to the regular Bunpro path as you’ll have to learn the rest of the basics at some point anyway.
I have no idea what your ability level is but I’d suggest finishing the N3 material if you haven’t already done so as that’s all pretty much used in the spoken language on a daily basis and then see how you feel. You could also try mining things you’ve heard spoken. If you intend to learn to read though then there are no grammar points you should avoid.
I hope that helped at least a bit and you can find what works for you.