About one year ago, I was doing 34.0-33.8 on XRG@BL1 with my own setup. An alien gave me a very fast setup (maybe the WR, or something very close). I tried it but got nothing better.
One day, I decided to focus on the combo and do more practise. After 20 or 30 hours, I was doing 33.2-33.4 using the fast setup. Then I tried my own setup. OMG, this is rubbish !
So my opinion is: a fast setup helps, but pay attention to your driving first.