To aid you with finding the parameters,
argon2_cffi offers a CLI interface that can be accessed using
python -m argon2.
It will benchmark Argon2’s password verification in the current environment.
You can use command line arguments to set hashing parameters:
$ python -m argon2 Running Argon2id 100 times with: hash_len: 16 bytes memory_cost: 102400 KiB parallelism: 8 threads time_cost: 2 iterations Measuring... 45.3ms per password verification
This should make it much easier to determine the right parameters for your use case and your environment.