legs and shoulders next time around. he has good back and chest development. widening his shoulders and thickening up his legs will take in his waist which is bordering on blocky. (from the proportions) I'd hold steady on the bicep development and get the tris up a bit too, the bottom of his arm(triceps) in fr double bicep doesnt hang too low but he has a great peak.
not much can be done right now except accentuate strengths and hide flaws, but after the show have him really focus on those areas.
he has a great base though. minor refinement will really shape him out to be competitive. what are his stats? ht and wt class