On a full frame camera, what 2 lenses would be your ideal setup? Yes, pick only 2 and go ahead and have fun with it. Extenders are okay, retired lenses like the 50 1.0L are okay, too.
Here is what I'd go with:
35mm f1.4L
85mm f1.2L II
My 2nd choice would be:
35mm f1.4L
70-200mm f2.8 IS II
and 1.4x III and 2.0x III extenders (even though they're not out yet).

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