Follow/Unfollow Help

Hi guys! I am growing a niche account. Current followers/followings: 1865/3514. I started this 2 months ago but I am not really active. Now I want to grow this account and following a lot. I post 4 pics per day, got 100-200 likes per pic and only some comments/tags. My question is what is better to follow until I reached the 7.5k mark or unfollow after a few days?

If you unfollow too fast, they caught you. IG isn't very happy of this strategy.

I would wait at least 1-2 week for mass unfollow, or just unfollow something like 5-10 daily.

try to unfollow manually or atleast bot down to 4k from 7.5k and then use crowdfire and the app to unfollow

Thank you for your answers. By the way, I'm following/unfollowing manually. Maybe I unfollow some every now and then.