Best build to level an Inquisitor as much as possible saving as many points as possible?

I wanna build a Paladin on the next expansion (Inquisitor + Oathkeeper) And to speed it up i would like to start leveling an Inquisitor now, but without spending too many points as i don’t know yet how deep into the Inquisitor mastery a good Paladin build will go, any suggestions for a good leveling build? I don’t expect to reach max level with this, just as far as i can while saving as many skill points as possible.

You do know you can respec mastery points, right? Just level inquisitor whatever way you’re used to and don’t select a second class until oathkeeper comes.

I don’t remember being able to remove points from the mastery level (the bottom bar), or was it only the last point of the mastery?

As many as you want, or all of them. Been this way since AoM I think.

ok then, i guess there was nothing to worry about then

All but one. You cannot remove the last one, as that would effectively respec the mastery.