I read through Treatmonk's guide that the Flaming Sphere plus Pyrotechnics combo is good which, upon seeing the spells, it is. However, the part of Pyrotechnics that snuffs out the fire seems to conflict with the duration of Flaming Sphere.
Flaming Sphere, Conjuration
Duration: Concentration, 1 minute
A 5-foot-diameter sphere of fire appears in an unoccupied space of your choice within range and lasts for the duration.
A 5' diameter sphere just fits a 5' cube, and Pyrotechnics does not need a non-magical flame source, so that's great. However:
Choose an area of flame that you can see and that can fit within a 5-foot cube within range. You can extinguish the fire in that area, and you create either fireworks or smoke.
The intention of the combo is obviously to keep moving the ball of fire as battlefield control, and blinding/creating obscurity with a mobile source of flame to debuff enemies.
Does Pyrotechnics snuff Flaming Sphere out, ending the spell early? Or does Flaming Sphere's lasts for the duration specification re-ignite the flame?