3,3 vs 8 has to be one of the most worthless indexes
I recently did my own cvdata index sims with Zen, and spent a lot of time looking at the output files. 3,3 (and 2,2) vs 8 were the most worthless of the whole bunch. Prior to that I had been including thoose indexes in my practice, but dropped them after seeing the sim results. I think the best option is to just hit. There was NO correlation up & down the whole TC range. 7,7 vs 8 was better, so I kept that (split at TC 7, DAS, no index for nDAS, for Zen). I suspect that indexes like 3,3 vs 8 are just archaic things that still persist for some reason.