If I can propose a harvest schedule/time, start with the lady right front (the purple white one), within a week. I think at 8,5 (max 9) weeks this one is done and ready for the cop. Then few days later, around 9-9,5 weeks chop the right back one (so other GBC x MBK) and lastly the left plant, the MBK S1, this one is still growing and bulking and will become a lot more potent if you keep her to 9,5-10 weeks.
Stripping away most of the leaves 2 days before harvest helps them to ripen and becoming a tad more compact from top to bottom.
Cheers mate