Started out the year with 4 sails, 2 masts and 2 booms. 3.5, 4.2, 5.2, 6.0. Two front foil wings one foil board covering 8-35kts. Only used the 6.0 a few times.
The goal for next season is 3 sails; 3.5, 4.7, 5.8. All wave sails, 2 masts and 1 boom covering the same range

Basically only on the 3.5m the last few months straight
Keeping fewer sails makes things way easier. If over powered switch wings, having two wings is like having another sail size smaller or bigger. Haven't touched the 4.2 in so long. There is no point in carrying around extra sails when you don't need to especially when switching wings is faster. Gotta love foiling!