Looking at LGW - HKG - MNL / BKK-HKG-LGW on Cathay economy for £680 October - Feb

Just seen I can flying LHR-HKG and back on BA on WT+ (with space to upgrade the outbound with avios to CW) for £940, which seems like a significant increase in comfort compared to Cathay (despite having exit row on CX). Flying back direct from BKK is an option, but those planes are so bad I would rather Y on CX than WT+ on BA9.

My issue is having to do two positioning flights in Asia (HKG-MNL and BKK-HKG), which adds £80 and 18k avios in charges, and especially on the way back I would have to leave a lot of wiggle room so that I don't miss the connection in case of delay. I've checked with BA about changing the start/end points to get it on one ticket, but it adds a lot of £.

This forum has been so helpful, so crossing my fingers someone can think of something I can't to make the BA more attractive (ie. changing something above). Thanks