If you have a purchased 2009-2020 account with verification, 2FA, a filled profile, and you post at least 1 post/video/article every day, then 4-5 replies per hour is also fine.
If you are not getting spam-blocked, everything is going well, and after a few days or a week you can increase to 10 replies per hour. Important: if you get a spam block, reduce the number of replies or turn off the bot.
It is important to do everything gradually. The main mistake is rushing. I made it for several months when I started and got a shadow ban: a week+ of full inactivity and a reset of your hidden score to 0.
I recommend reading a thread from a popular influencer who has been studying the Twitter algorithm for a long time. https://x.com/AlexFinnX/status/1965438865789071438