8 Question

I have a question, the arc with Mc and Kira is long, do i go with it, or go back into the high school story? I want to build up ever character, and there connection with the Mc. I was going to go with the Kaguya arc but I can change that around, I'm only asking cause the story could go either way, but this is one of the longer arc's in the story, I mean there will be longer but this one has a whole volume to itself.