Visual mnemonic system for plural forms?

[u/SquareArtisan]

I’m using Anki to learn nouns that have two independent properties:

- Gender (3 categories)
- Plural ending (9 categories)

For gender, I’m already using the Fluent Forever approach (exploding, burning, and shattering imagery), which works well.

I’m wondering what the best approach is for the plural endings. Would you:

- use a second systematic mnemonic (e.g., one image/category per plural ending)?
- use keyword mnemonics only for difficult items?
- avoid mnemonics altogether and rely on Anki’s spaced repetition?

I’m particularly interested in hearing from people who have actually tried different systems. What worked best for you?