Sorry should have paid more attention to the dates puts a small spanner in the works I guess. I would probably say the biggest stumbling block in maximizing status credits is using CDG as the entry point instead of sadly LHR, as BA has the best coverage for Europe/Middle East.
I thought of this however due to BA/AY using terminal three you would have to go T3 to T5 unfortunately so by avoiding staying the night in London.
9th DFW-CDG August 140 sc
12th CDG-HEL 60 SC
14th HEL-LHR-DXB 160 SC
15TH DXB-LHR-HKG 260 SC
16TH HKG-CMB 100 SC
So I think this gets you 580 instead of the 500 you had I think and gets you to where you want to go and apart from the initial terminal transfer from T3 to T5 the rest would all be terminal 5 if you choose BA for the LHR-HKG.
Hope this covers your dates.