Let's entertain a thought.
The best thing we could potentially do is spread as much FUD as possible regarding the 51% pushing all CEX into closing withdrawals in fear of getting double spent.
If all CEX close deposits the attackers will be forced to use DEX like RetoSwap where confirmations are a lesser problem. It would push liquidity to DEX and render price suppression moot.
Often the best strategy is to play into your adversaries cards and exaggerate their intentions to create disruptive and unforeseen development of things.
Bring on the FUD. Shout it from the roof tops. Pressure CEX into closing deposits.