I think that box take-offs would fit in well during GPP of Charlies S-L… as acceleration and hills seem similar.
For the last 3 years I have done a HUGE Thursday plyo’s session in Prep… they’re noted in my log… up towards 300 contacts. Many single leg off boxes. Weighted vests are added and reps are cut, with the weight going up. Then the cycle finishes with no weight for two weeks. The vests dropped the CNS intensity tbh.
However the session is too much… all other training components are adversely affected as the CNS gets fried.