How To Approach A Lucky Ducky Session

Nothing in a slot rewards skill, so the only decisions that matter are the stake and the moment you stop. Both should be set before the first spin, not during the session.
Staking around one percent of a session budget per spin keeps a bad run survivable and makes the session last long enough to be entertaining.
Raising the stake after a losing streak recovers nothing: Lucky Ducky each spin is independent of the previous one.