It says weapons and devices.
Thanos used one weapon and stopped Warrior Madness Thor in a matter of seconds.
Between him and Doom, if they wanted, they have weapons that could easily destroy the Earth that they're fighting on.
That would leave:
Thor and Silver Surfer
Thanos, Ultron, Mangog and Doom
Sure, technology can be used to drain or BFR Hulk. But as I said, prep time wasn't discussed here. So then it becomes a matter of who gets off the first shots. If Prof. X can unleash WBH before they deal with Hulk than the fight swings in the heroes favor.
Especially since Ghost Rider's penance stare could spell trouble for some of these villains. That and Dr. Strange might give the heroes enough time to pull it off.