My ideas:
- extend MMX to Socket 7, so that K6 can compete as well, at some benches competition might be close
- 370 looks good, I'd exchange Aida to 2000/2001 with GPU capped to GF4xxx/R9600 (excluding 9500)
- have a round for 754 as well, 939 is well-exploited but 754 is a bit forgotten
- maybe also a round of something completely crazy, like legacy multi-CPU or Voodoo madness (with 1 stage for Voodoo2, 2 for 3 and 2 for 4&5)?