DEPENDS ON YOUR NEEDS.
I'm a 24 words type of guy.
Discussion
Yeah, I saw a video of someone explaining that 12 words is just as secure as 24 but I serious doubt that. It just doesn't math.
The idea is that computer programs that could crack your seed are not strong enough to break 128bits of encryption, so why go to 256.
But I'm the guy who has a backup to the backup 🤷♂️.
A second strategy which is more advanced & I don't recommend unless you're committed to practice often,
24 word seed, you memorize all of them, now you have three wallets.
First 12 words,
Last 12 words,
24 words.