Some great thoughts here, thanks.

the Moscow idea is a good one, I believe it's the only Europe route qualifying for reward saver that uses long haul aircraft, so a good option for the 2-4-1.

Yes, I need to use BA metal (or at least a BA flight code) to use the 2-4-1, which rules out the better options of ex Dub or ex Mad for a transatlantic flight.

looks like my original idea wasn't too bad, although I like the idea if F instead if J, I'll get spending to get those miles (and work on work travel approval from my boss, that would help!)