IMHO I suggest the following plan:
1. Hold meetings of miners in private (the same interests).
2. You must reach a consensus of a Mining Alliance of +75% to solve this crisis (zero-sum game).
3. Announce and consolidate that alliance in the text associated with the blocks.
4. Coordinate and compensate between you to neutralize the incorrect blockchain (hard is hard).
5. Acting forcefully, quickly and always in your own interest.
https://coin.dance/blocksI never imagined that in the second phase of the plan there would be a mining consensus greater than 85%.
More than enough to neutralize with empty blocks the bad blockchain.
Without precedents. Good job miners!
Developers who like takeovers can only change the PoW algorithm desperately or checkmate.