Javi considered that a 3-quad & 2 3 Axel free skate would be enough to defend his title, I don't think so unless he has a sure bet that his main competitor & training mate will not be able to deliver a clean 4 quad & 2 3 Axel long program, otherwise he may need to upgrade his technical ante in the later season like he did in the previous season.
Well, if anyone has insider's knowledge about how he could beat Yuzu right now, that's exactly him. Javi probably knows how much he needs to win, and how much he can push himself towards this goal. It would be impractical to try things he's not ready for.