Fascinating, thanks for posting. I thought I'd share my pathway to GGL renewal. This is 3,000 TP. Year end is May so about 4 months in. It's a more conventional route, i.e. lots of AA SH P class fares because I live in the US although AA numbers are also flattered because I do regularly travel with them direct to Europe.

Miles flown (BA's number with actuals for <500m): 57,470
Miles by airline: BA 54%, AA 22%, US 24% (so really a 54/46 split)
Miles by class: C 1%, F 27%, J 65%, M 2%, Y 5% (basically SH AA/US, LH BA, with a few pre-April 28th BA1/2)

TP Total: 3105
TP by Airline BA 41%, US/AA 59%

Sectors flown(paid): 35 (BA 12, AA/US 23)
Sectors redemption: 10 (all AA short haul Y)

Avios Earned 141,011
Avios by airline: BA 53%, AA/US 47%

Days to post (average): BA 1.25, AA 2.2, US 4.3