For a personal build, my focus would be on the wheels first (bike came with 27s). Then I would pull out some Cyclone generation 1 components from the bin, just because I like them. I am not a big fan of the custom cranks either, so I would probably swap them. Vx is a good RD if that is what the bike has (bike was spec'd with ARX GT rear, nothing wrong with it either).

On personal bikes, I tend to rob the bin a bit, with one of the nicer sets I have on hand. I use a lot of Suntour bits, so those would be the first I pulled out. My last personal vintage build got Cyclone G1, build before that got Superbe Pro.