I disagree entirely with the idea that Nimrod could somehow shut off or drain Savage Hulk's gamma.
For one thing, Hulk's body houses the conduit through which Hulk gets the overwhelming majority of his gamma, external/environmental gamma adds to that but it is overwhelmingly internally based. Nothing to cut him off from, basically.
As for draining his reserves, only when he's calm and for as long as he remains calm. And even then, only Surfer's managed that approach against an angry Hulk (iirc - I think Arch'meddon did too).
Hulk's agility is far and away superior to Juggernaut, Nimrod simply won't have any option but to physically tussle with Hulk - just read his fights to see how often Hulk is the one overwhelming his opponent with speed, rather than the other way around - and as for strength, Juggernaut's statement is not in anyway a measure of how hard Hulk hits, as Savage Hulk (like other iterations) can instantly increase his output exponentially.
Your use of Juggernaut as stand-in for Hulk is not sound, it's like using Norman Osborn as a stand-in for Iron Man. In the former, you've reduced it down to two "bricks", in the latter case we have two "brains". Nobody would see this as a valid approach, if they know anything of the history of Norman and Stark.
Similarly with Juggernaut and Hulk, one is just a magically enchanted slow, deliberate and limited force with extreme levels of endurance. He punches, rushes and kicks, but mostly he reacts and leans on his enchanted invulnerability to win him most fights. He's easily bfr'd and he rarely uses his brains at all (not that he has much).
The other is an even stronger, far far far faster, tactical and highly battle smart fighter who often uses his smarts to take down opponents and who constantly adapts his approach to get the most effect out of his physical qualities.
Hulk is proactive, when he decides to fight, he uses the environment, weaknesses in his opponent, his incredible speed and accuracy (hit any target with Bullseye-like accuracy) and Banner's super-genius calculating brain to work out the most effective attacks, everytime.