Thinning spots showing through, fibers or something else before meds?

Just turned 30, and the crown's gone from full to "eh, maybe if the light's right." Tried basic thickening shampoos, but they fizzle quick. Picked up Febron for a test run - the fibers stick decent and match my dark hair without looking powdery. But does it hold up in sweat or rain, or am I better off with toppers? Not sold on starting blockers yet, want something simple first. What's your go-to for spot coverage that doesn't scream "trying too hard"? Routine tweaks welcome too.