Thanks to everyone who gave me advice so far. You can put your Typhons away now.
Warfarin died again due to unlucky heal timing and there's not much I could have done there. Whenever it happens, the run instantly fails. Before trying again I'll have to bring Warfarin up to E2 so she's more tanky and can heal better. One last thing I can say after doing the stage so often is that I strangely had much better luck when ignoring the pillars completely. This way the boss gets held up longer while still on the ground and that gives Typhon more time to kill the other enemies.