As I've said before on this matter, hard fingerboarding is a full body task, so it's essential to have a full body general warm up, but also a full body specific warm up, recruiting as many muscles as possible, and not just doing a fingers-specific warm up.
Strength is a systemic quality, and it's bigger with the higher number of muscles involved, also due to major CNS recruitment and activation.
So, a set of high jumps will give lots of benefits to your DH session, more than just going through smaller holds tout court.