Depending on the amount of days in the trip, if you’re taking 3-4+ trips, get annual passes for everyone in your party.
If making just 2-3 trips, get an AP for one member of your party and use that person’s card for all purchases and save money buying multi day tickets for the others. This will get you the 20% merch discount, the 10% dining discount, the ability to book deeper discounts for onsite stays, free parking (~$25 a day) if staying offsite, 10-15% discounts on tours, experiences, and special event tickets, free Photopass for everyone linked to you on mydisneyexperience ($169-199 savings per trip), discounted admission for you and guests at water parks, and 15% discount on rentals, sports, recreation, mini golf, etc.