A US company is working on an auto throttle for twins, with one objective being to address the OEI / EFATO scenario much faster than a human pilot could.
I can’t see a product for piston twins on their website, however.
Rudder bias would be a good start. In the BAe125 (Hawker) I used to fly it was on the MEL …no rudder bias, no go.
The effect was that an EFATO was a complete non event.
