>>714368675
If you mean clearing raids
>It takes around 6 months to go from Sensei level 1 to 90
>It takes another 6 months to properly build your Students from 3 to 5 stars
This means that during your first 6 months or so, at most you will be able to clear raids up to Extreme difficulty
But it might take you 1 year or so to clear Insane/Torment/Lunatic