The QTE requirements for this achievement in particular seem much more strict than the other missions; you can only afford to get 3-stars on a single QTE;
the rest have to be 4-stars. This is on top of the 90% health requirement of the proceeding battle.
Follow this QTE map (made by Yasminkov 7000):
(1) to attack
(2) to tag in Obito
A series of dodges follow -
,
,
,
,
(3-7)
As Kakshi attacks tap [cn_left , cn_right] (8) rapidly as they count as a single input.
Two jutsu follow with
,
(9,10)
These double input are the hardest to time right as the timer is very short I would recommend using the
and waggling it left and right after the final dodge then alternating
and
to get the 4 stars on each.
Finally
in the slow finishing box (11)
44 stars available , 40 required for S rank.