Like WaniKani but for core vocab, or force WaniKani to teach core vocab?

I used WaniKani a lot a few years ago and got to level 40 something.

I really like the system. I've tried so many SRS apps and it's been my favourite by far. If I had to rank them (on ease-of-use, comfortability) it'd be:

• WaniKani
• Memorise
• Bunpro
• Renshuu
• Anki

I particularly like that it forces you to go at a certain pace.

Now I want to improve my vocab and fill in the gaps I have, so I want to study the core 10k vocab.

I was wondering if you had any good suggestions on how to study it? Ideally something like WaniKani, or if you know of any WaniKani extensions that change it to Core ordering.

Any recommendations would be greatly appreciated.