Hello! I have completed the N5 Bunpro grammar deck but have 700ish to go before finishing the N5 Bunpro Vocab deck.
Should I start the N4 Bunpro Grammar deck and continue with my N5 vocab deck?
Or would it be better for me to finish the N5 vocab deck + continue the reviews and start N4 vocab and grammar once I finish N5 in its entirety?
Depends on what your goals are really
If you are planning to sit N5 in July, for example, then it might be worth focusing on solidifying your N5 knowledge before then to give you the best chance of passing (those tests aren’t cheap, especially if you have to travel to them)
From personal experience, if you’re looking to start diving into more immersion/native content (e.g. the Wanikani absolute beginner book club) then a bit more grammar can go a really long way. It is quite easy to look up vocab and get a quick answer on what it means compared to grammar. Also, you might find you know more vocab that isn’t necessarily on that N5 list.
Ultimately though, it’s probably best to figure out what it is that holds you back when you’re trying to read/listen/watch/speak Japanese (or, if you’re not doing any of those things outside of reviews, maybe look into doing that as it will improve your knowledge + understanding so much)