Hitboxes are very blatant in replays, you will most likely get staff banned if someone reports you or you climb the divisions.
I suggest not using hitboxes at all but if you really want to:
Hitboxes: 0.05 or 0.01
Again I do not think hitboxes are a good idea unless you are prepared to get banned.
Basic Blatant Config:
AC: 18-20 CPS
AA: Any
Reach: 3.5-3.7 or 4-4.25 (you'll get banned faster with this)
Velocity: 0 100 100
Hitboxes: 1.00
And use whatever else you want if you have V4 (Speed Anticheat A or Bhop, Blatant Scaffold, Keepsprint etc.)
There is such a lack of detail but for semi-blatant:
AC: 17-20 CPS
AA: Your Preference
Reach: 3.2-3.3 Vertical Check, Only while Sprinting.
Velocity: 85 100 100
You might get staff banned if your ms is too low and if you're trying to look legit use misplace.
What, you could easily use 85h on Hypixel without getting banned for a very long time (unless you're on RSW). 90h is pretty closet and wouldn't even get you hackusated.
I'm just going to assume you mean Hypixel.
Reach: 4.0-4.25
This should bypass but you will get banned eventually. The reach limit on Hypixel is 4.25 due to NCP.