Using Audio Stretch and VariAudio on the Same Tracks

I need to increase the tempo of some audio tracks by about 6 - 8 BPS, and I also plan on doing some spot pitch corrections (using VariAudio) on 6 vocal tracks. I am familiar with each of these processes, but have never used them together. My question, then, is will I get better results by doing the vocal tuning before or after the tempo adjustment? Or does it matter at all? Note that some of the vocal corrections are on sustained notes with bends/slides (which I imagine will be impacted by the negative audio stretch). Thanks in advance for any advice you offer.