I think in the end everything you memorize is using a mnemonic, but mostly unconscious. Not a story system like for Kanji.
I have the most difficulties remembering the English answer in WK, but I remember parts of the answer like eg. the position of the first letter on the keyboard (upper right, lower left etc.) or that it has only three letters or is extraordinarily long. I also somehow attach colors to vowels, eg an A is blue for me and an E red. It is a mostly subconscious system and I started to notice it only recently. It seems it also connects feelings to words. Like “melee” eg has something very soft and wooly, please don’t ask me why 
If I wouldn’t have checked the dictionary, I would think about something very cute a three coloured kitten is doing, because it is also stripy (I know this only applies to me, and seriously I don’t know where these associations are coming from).
So I remember: starts in the lower right corner, very soft and wooly and red, and lot of similar vowels of which there is a repeated one and the repetition happens in the end or something like that.
For me, English is easy to remember, but as I am writing this I will try to map it on Japanese words. Eg I could imagine to feel a color connected to radicals. And soft/ hard to rendakued things.
Actually I thought about making a script to show a different background color for each Onyomi. That would make an instant memorization possible, like red for こう, blue for あん, green for うん, yellow for き. There must be some kind of logical system but I haven’t thought about it yet because I can’t code. But I could try it in my Anki deck! Sorry, I also realized that I am thinking while I am writing. Maybe that’s because I don’t have a person to talk to in real life who is interested in learning Japanese 
The character I like the best in the WK world is the anti heroic “you” in the mnemonics, I love how “he” (I) stumbles through this mysterious world, I want to be more like him. 



). So far so crazy, therefore I am testing now how far I can get believing this to be true (because I have nothing to lose
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