Sorry I wasn't idling on djt that much the past months so I didn't see your reply even though you replied me 5 mins after.
I hope you see this even if my reply is an hour too late. I'm somewhat hesitant to give you this advice because from what you've been saying so far, I think number-wise you know more, far more kanji in quantity than I do.
However, are you familiar with the term 意符 音符 and 形声文字? All kanji books worth it's salt would teach you about those three terms. I actually have RTK1 but I never read the intros so I don't know if it's ever explained there or not.
If you know what the three terms means, it will helps you immensely with figuring out how to read words, and you may not even have to grind vocab that much.
How to read. Let me give an example, 義理 会議 礼儀 犠牲 all are using a variation of 義. Even if you don't know the meaning of all 4 words, you can "guess" that it’s possibly a ギ, if you are aware of what 形声文字 means and how prevalent it is in Japanese.
So in another example, a 交 can take 交通 学校 効力 郊外 and and you can guess that it's probably a コウ.
Now, you just have to remember that 較 is カク instead of コウ from knowing the word 比較.
That will cut your vocabs grinding by some degree I'd assume.
If you already know how to read, thankfully a lot of japanese words are not 当て字 so while I may never heard the word 校歌 before, I can guesswork that it has something to do with "school" and "song".
Now when it's 当て字, you can guesswork right away if it's 当て字 now that you've finished RTK1. In 寿司, 兎に角, or 目茶苦茶 the kanji is just used for it' sound.
A big percentage of words are 形声文字 so if you have 3,000 kanji in you or whatever is the amount of RTK3 is, just start reading more.
Of course you have to pay attention to irregular readings, and that's where Anki and exposure helps.