I would not want this exact feature but I’m also interested in optimizing my time spent on WaniKani so that I can spend the remaining time elsewhere since my study time is unfortunately limited.
What I do is: I use the Anki mode script ([Userscript] WK Anki Mode) which significantly speeds up my reviews and lets me choose which content I want to focus on and which items I just always mark as correct (while still seeing them and being at least a little exposed to them).
My current approach is:
- If I get a radical wrong because I confuse it with a kanji that looks the same but has a different meaning attached, I usually mark my answer as correct.
- I’m 100% strict on kanji meanings; if I get the meaning wrong, I mark it as failed even if that means leveling up slower. This is where I draw the line for myself.
- I don’t care about the kanji readings; I will still try to answer them but if I get it wrong, I just move on anyway
- For vocabulary, as long I can recognize all the kanji, I mark it as correct, even if I get the meaning or reading wrong. I think it is unnecessarily hard to learn vocabulary out of context and new words stick much better for me when I encountered them here in WaniKani and then later somewhere else “in the wild”. I don’t want to waste my time on words that I never come across elsewhere. The time will come when I remember them but it is not now and I don’t want these words to pile up as apprentice items. I do however never burn a vocabulary item that I don’t know so that it will keep coming back up again and again until I remember it, just less often.
This is not exactly what you were asking for since it is not an “auto burn” but for me it is a good compromise between making progress by being exposed to new items and not spending too much time on items that just won’t stick (or in your case: that you know already). I would not want to skip all the vocabulary because I still think it is very valuable to be exposed to these words after learning the kanji but I don’t want to spend a ton of time on it.
I might also have written a script that auto completes the quiz after lessons but since that might not be a great idea, I never shared it here… (but I would if someone wants it and is aware of the potential downsides)