When the dealer has an Ace showing, the strategy should focus on minimizing risk. If you have a total of 17 or higher, it's generally best to stand, as you have a strong enough hand to avoid busting. For hands totaling 16 or lower, hitting is usually recommended since standing leaves you vulnerable to the dealer's potential strong hand. Soft hands (those with an Ace) should be hit if the total is low (Ace-2 through Ace-7), but you should stand on stronger soft hands like Ace-8 or Ace-9. Doubling down is generally not advisable when the dealer shows an Ace unless you have a very strong hand. Additionally, it's typically better to avoid insurance, as it carries a high house edge. Overall, the key is to play conservatively and adjust based on your hand’s strength.