What kind of clients do you have? With modern iOS and Android devices I simply don't recommend doing too much band steering. They all understand to try 5GHz when possible. They will use 2.4GHz in situations where they think they need to like if you are rapidly moving or they are using LTE bands that interfere with your chosen 5GHz channels, etc.
Unless you have older problematic devices, in my opinion attempting to have the AP aggressively balance or steer can cause more trouble than it's worth.
It does help to keep 802.11k neighbor lists enabled though.