I will b racking up a significant amount of miles in the next 18 months or so. Monthly travel SIN to TPA, via London on separate bookings and all on *A. Now I had been all set to dump all miles to UA but just been checking DC and it seems as if I can earn more and burn less with DC???? I am I reading this right or is there something fundamental I am missing. I will earn enough to get 1K and the 6 SWU but I'm not sure how valuable these may really be????
Any thoughts?

Thanks