USJ studio and express passes on different platforms/devices and restaurant tips

1. Can USJ studio and experess passes be purchased at different times and/or devices/platforms?

We (2 pax) are planning to go to USJ in November. Is it possible if one of us will purchase all studio passes and the other one will purchase all the express passes?

Examples:
– Scenario 1: Person A to purchase studio passes from Klook, Person B to purchse express passes from the official website
– Scenario 2: Person A to purchase studio passes and Person B to purchse express passes both from the official website

1. Restaurant recommendations and tips on preparing/dealing with long lines during meals (reservation maybe?)