Some Finnair Plus L class calculations:
BA 50% status and award miles.
AA 100%
QF 100%
LA/4M/XL/LP 50%
(CX/KA 100 %)
(MA 100%)
(AY 50 %)
(JL/JO/EG 50 %)
(RJ 0 %)
(IB 100 %)

Using webflyer.com the result would be minimum 38270 and maximum 47460 (if both SCL-AKL and BKK-LHR would be flown by QF). Intra-European Y class award ticket costs 40 000 and Finnair Plus Silver status would require 60 000 points (at least four segments by AY) including lounge access when flying AY. Upgrade to C to India (offer/even ridiculously cheap tourist class tickets) 20 000 OW/40000 points R/T.

Disclaimer: written after enjoying two glasses of excellent wine

P.S: Finnair counts kilometers instead of miles.