Sorry, I guess I should have been more specific. When jumped, both fans are only on 100% of the time that the A/C is switched on.
85 amps at 1,000 RPM is not too terrible actually (Factory alternators on my 98 LGT and my 99 OBL were rated at 85. And all ratings are at 1k RPM). My 86 Z28 had a 45 amp alternator and my 04 Accord V6-6 only has a 100 amp alternator and has a quite a few more electrics.. The problem with the Subaru is all of the grounds on anything electrical. They were bolted to painted surfaces. This is why people frequently do the "grounding mod" or clean up the factory grounds. The grounding mod involves using larger gauge wire. So, some systems will actually be able to pull more power and run as efficiently as possible.