I wouldn’t split it 3 ways for a 7 night trip. If your heart is set on AoA, I’d do movies for 3/4 nights and LM room at AoA for 3/4 nights. By the time you pay for a suite at AoA you can stay deluxe so I’d almost always recommend a deluxe resort over an AoA suite unless you have a large party that can’t fit in a standard room.
If your goal is just better transportation with the skyliner access at AoA, I’d suggest looking into Pop. A lot of times their standard rooms are a bit cheaper than the LM rooms and you can always walk over to AoA to look at all the big fun theming there.
Since you’re looking at yacht club, have you considered the Swan/Dolphin? You can usually stay there for about the price of a moderate and can walk/boat to Epcot and HS. A few years ago I did a split stay between movies and the Dolphin and it was great!