Corned Beef doesn't always work, especially if you have low stats. It relies on your agent getting an early turn and that he stays above 60% health.
So obviously if you go up against a high stat Quicksilver team, your agent may very well get killed or put below 60% health before he even gets his turn, and thus you cannot activate the scroll.
Things that can help you get around this:
- Combat Communicator (SO item, not everybody has it) gives your agent a higher chance of going first
- Guardian Insignia (CO item, not everybody has it) gives you Survival Training, causing your to take 50% less damage while above 80% health. Alternatively you can also bring Falcon (costs 200cp) who has the same effect.
- Iron Fist with his E-iso has 100% chance to intercept and prevent 2 attacks, making him a good choice against Quicksilver teams as he can stop those early attacks. Protector heroes that can protect your agent are also good (Groot, Wonderman, etc.)
- Quick Action healing items or heroes that can heal, to help your agent stay above 60%
- Heroes that can grant extra turns so your agent gets his turn faster (Cable & Nico are the best at this)
- Items that gives your agent immunity or damage reduction to dots and damage effects (Techno Organic Skeleton, Fist of the Colossus, Atillan set, and more)
- Debuff prevention items, such as Mystic or Nightcrawler with his E-iso that gives Mystic Shroud
- Stun immunity
You will also want to bring items that either negate Disoriented or that can remove it (Scroll of Angolob, WCD, Sattelite Support, etc.) Because if your agent is disoriented, he has a 50% of hitting an ally with the scroll instead
Basically you want to do whatever you can to ensure your agent gets his turn as fast as possible and takes as little damage as possible during the first round.