Too bad for that rule. I think I'll still try and see if they enforce it. NA direct to SWP with a transit through Asia makes just as much sense as Europe-SWP through Asia.
We always do our rtw's westbound (better for jetlag?) and ex-YVR (CA fares). We could start with YVR-LAX-AKL but the first (QF codeshare) leg would be on AS metal and I doubt it would be eligible.
Otherwise, I suppose we can use our 4 Asian sectors first, then SWP, thence AKL-SYD-Europe on BA or CX (or QF for that matter, tho' we've never done a longhaul on them and don't know how they compare. I think we'd end up with a lot of miles doing it that way, which doesn't impress me.