03:36 - 11:57 D550
Auto completing these is going to be more difficult now.
The rock pillars encountered were three: one was destroyed when calling Valefor and Cloud in his DABS3 + ZSB3 took care of the other two. Critical hit damage party buff applied by Zack's AASB1 on battle start helped Cloud getting the 50000+ hit required to destroy one of the boulders.
As I beat the first 6★, I've unlocked access to Argent Odin fight but I'll be doing all the other 6★ battles first.