My travelling companion lost Silver because she had to make a DCB-MEL round trip and got no TPs with that due to the changes with QF and EK. Thus, she was 70 Avios short of Silver and lost it.
Right now she is Bronze with 300 Avios and 2 sectors. Later this month she is flying DXB-HKG-MEL round trip with Cathay, but unknown to me she is going cheapseats and will get only 70 Avios. So, I bid in Bus to Hkg and PE to Mel, in an effort to get more Avios. If the bids are successful she gets a lit more Avios.
Then, in July Aug she will do 4 BA sectors between DXB-YYZ but has not booked them yet. Probably I will get her into PE so that will give her 360 Avios. Another HKG-CDG sector will give her more Avios, and double if she returns via BA.

Basic question: with 2 sectors and 300 Avios in Bronze, what does she need to regain Silver?
Thanks for info as I could not figure it out from the Sticky.