I think they just need to remove the OHKO's from Twintania (except for Aetherial Profusion & Dreads).

Electric Fence make hurt like 2k & stun for 5s.

Conflag explosion make hurt like 3k.

Twisters make hurt like 4k.

Maaaybe also slightly reduce the Snakes' damage output.

Now the fight is still appropriately difficult but screw-ups & lag-faults are far more recoverable.