Don't underestimate the value of MAQS if you have problems when they're filling supers.
My failure in earlier years of beekeeping, was to cross my fingers and hope! I was lax in doing varroa counts.
Plan ahead, do varroa counts every so often - but don't panic!.
Use a variety of oxalic acid, physical interventions and medication throughout the year.
Just be attentive.
Dusty