Wrestler X, taunt, wulfshoot, grab blockbusters, as much accuracy as you can get from your moves. Try to avoid combos without hype active. Your goal is to build up hype and meter asap, and then spam grab bb's and hope for bleeds. It's honestly pretty straightforward once you get a hang of it. I've done it under 2 min for the challenge theo, although I spent a bunch of coin to upgrade accuracy moves.
For the Val node, you just need a stronger Val. Equip vial hazards for long combos.