you won’t burn out on vo2max or threshold unless you do too much of it.
Hit a 3 week block that has 1-2 of those per week, then hit your rest week.
Cycle it once more, or change up the durations a bit. LIke do longer vo2max or shorter micro burst workouts depending on what you did in the initial 3 week period. This will keep things fresh (mentally important for those really hard sessions) and challenging and you’ll make gains without crashing and burning.
Good luck!