Studying for only ~8ish months so take my words with a heavy grain of salt. Started with core 6k deck as a fresh beginner and using wanikani’s mnemonics to help teach me along the way (basically just copy and pasted everything into the deck along the way.) Did this for the first 2k words but the way it’s structured is really tough as early on you’ll be swamped with new kanji and words you’re very rarely going to see as a beginner (for the most part)
After that I switched to the WK deck and suspended everything that wasn’t vocab cards and started from the beginning, suspending cards I had already learned along the way. This is an interesting approach as you’re starting with simple kanji and then building off of that with various words. One issue is that some of the words early on aren’t exactly useful (Planets???) but they use the kanji so good to know. I’m really enjoying this method, will finish the entire deck then either go to making my own mining or finishing up the core (most likely.)
I think people also do the Tango N5/4/etc. decks but never used them so can’t comment. If you’re a big VN fan there’s decks out there that iirc are like 2k most common words used in there so you’ll be able to not struggle. Again, haven’t used it but just going off of what friends told me.