And?
Look at the skillset of Sadhu
Out of Body - Toggles the Out of Body state, 0 cooldown so you can enter it whenever you please.
Vashiti- Only usable in Out of Body state, cancels all auto attacks.
Astral Body explosion -Only usable in out of body state, no aoe ratio aoe that knocksback targets and ends Out of Body state
Prakiti - Moves your Body to where your Spirit was, ending the Out of Body state and healing.
Possession - A channel attack used by the main body that does not allow Out of Body attacks and Binds targets stopping them from attacking or moving.
Transmit Prana - A buff to allies.
everything except Possession and Prana is about the Out of Body state, which yes allows auto attacks but you have 3 skills that are completely dependent on you being in that mode, not simply auto attacking, in fact all of them stop you from auto attacking lol.
Out of Body ends whenever anything hits your body and yet Possession is a melee range move usable in Out of Body state (and out of it) that stops things from attacking…your body, preserving the OoB state.
We also know that the Spirits stats do not change when yours do, which means you are free to Transmit your Prana while in the Out of Body state, as the spirits stats will not be altered by you giving yours away.
I think its pretty clear that the entire class is built around Out of Body and not solely auto attacking, especially given that the majority of Possessions damage does not come primarily from your Int (unlike OoB’s auto attack) but through its Base damage and your magic attack (Magic attack from Weapon and level are unaltered and you still have some Int remaining).
So Possession is an attack that works well without your Int and can be used to defend your body (or you can use it proactively instead of defensively), Transmit Prana doesn’t affect your spirit but that goes both ways meaning you’re free to buff allies and the other 3 skills need your spirit to work and you’re going off an auto attack? Hell Oob’s auto attack reduces physical defense increasing your party dps contribution by making the physicals do more damage.