Kava are like benzos, alot dont jotice the subtle high. I highly reccomend starting with doses between 5-10gs. Thats still my go to dose after using it for 2 years or so.
Taking large amounts like you mentioned is not needed. That being said, its fun to do here and there.
It seems like OP is towards the end of his taper plan. Unless he is allergic to kava, it is completely safe. IME kava doesnt extend WD to any noticeable degree,