I will disagree in this particular recommendation. I did Heisig until chapter 14 or 15 (around 300 kanjis). Doing a lesson a week. All this before starting WK.
As I had already put the effort into it, I kept doing it for my first month in WK. The problem with sticking with two different methods it’s the overload of the basic parts. The “radicals” or “primitives” used to reference when doing the mnemonics started to get confusing… because they are for the most part the same… just not exactly… and using the name for the radical in one method into the other method was a recipe for disaster.
For the other part the keywords of every kanji in both methods are slightly so different; which doesn’t seem a big deal when learning 100 kanjis… but then in the 500 numbers (and probably even more relevant in the thousands) it gets really confusing as more and more all too similar kanjis emerge.
I will suggest ONE method for learning kanji, stick with it if you see it working. It takes time, no matter the method. WK gives you 2000 kanjis… there’re more, but you will figure about how to learn the ones you are missing be then (exposure, immersion, etc) and will be needing.
… I was using the Kanken books for learning the readings as well, and I also like those books.

Let’s see.