The "mona is enough for freeze" is kind of a moot point because it applies to sucrose being enough too. OP doesn't need Venti for a working Ayaka team so "being enough" isn't what you should be valuing right now.

Yes, Kazuha is a better pull than Venti but that doesn't mean he's the second coming of Christ or a must pull regardless. Fact is, you're not wasting primos by pulling for either but there's definitely one more valuable than the other for your whole account.

Kokomi and Kazuha are better pulls than Venti simply because they add more flexibility to your account in general, and if you don't wanna pull for Kazuha then sucrose is more than enough (and still more valuable than Venti for your entire account because of how her utility works, especially now with dendro).

This doesn't mean Venti is a bad pull regardless, and if you like him it's always a great pull. But let's not pretend that the other options are just better in terms of pull value