tbh I think this should be avoided with the more fundamental radicals (the lower level ones especially) because they’re used in so many mnemonics. Somewhat ironically I have found the narwhal to be one of the most striking and useful mnemonics. The higher level ones are kinda whatever, I just mark them correct with double check every time after guru, because they’re used so infrequently.
Anyhow the OP might find the keisei phono-semantic composition script (in addition to wikt) to be useful if they’re planning to continue with wanikani.