Your feet will buy you time to react. Practice it with a sparring partner dont hit him just block and evade and move out on angles if you are in full retreat. If you move out of range on an angle to the outside of his lunging attack you only have to deal with that arm until he turns towards you, that is your time.

On the other side of the coin 'no retreat side', do what Nikola says and move in and swarm his arms you have two hands he has two, put yours in the way of his movement to cover yourself as you move in, then slip out of his arm reaction and bang up the opening that he leaves.