Zulrah or Gauntlet Grind?

Recently finished SOTE I was grinding Vorkath before that and now I’m ready for a change, I have 1 KC on both Zulrah and Blue Gauntlet I found Zulrah absolute hell and it took me a good 20 attempts to get my KC and blue gauntlet about 4 runs to get my first KC.

Which would be best for making some good GP whilst saving for a bowfa?