On BA/Kulula- Just be careful of which flights you book. Some booking systems & Kayak (wrongly) show 'BA operated by Kulula', when those are 'BA operated by Comair' flights. BA64xx flights should be fine for MPC accrual, and Domestic RSA biz fares are quite reasonable (follow BA's accrual rules- so watch out for the fareclasses in coach). However, as the others have mentioned, I doubt if the miles will post in time.

These Comair flights are just like regular BA flights.

http://www.oneworld.com/web/10180/34

https://www.asiamiles.com/am/en/earn/airlines/detail?refID=aabecbae27dea110VgnVCM1000000ad21c39R CRD

MPC cares for the date that the flights post to your account, not the date that you took the flight on.

The advice above is sound- you should ask for an extension of the membership year so that the flights post before status expiry, perhaps mentioning the flights /PNRs that you have already booked, and are likely to post within a few days. I wouldn't be surprised if they just upgraded your tier based on that.