The HH and 100m hurdles are at the same distance (almost). You can always assume that a good fast High Hurdler can also run a relatively fast 100m.
So throw out the 100m.
Pole Vault is a discipline that takes years to full develop. Most decs never fully master it. A good vaulter requires speed, upper body strength, and heightened body awareness to clear anything big.
Tools he will need to training in the throws.
400m- Test of ATP CP.
If I had to go another it would be disc.
Shot put is more of as one of former athletes says “strapping on a pair” (of things between your legs) and throwing. Which I except because he is pretty strong. Discus factors seem to be pretty different as it relys on much more balance, rotational forces, and keeping a wide radius which is not required in many other track and field diciplines