I spam ammo/med packs as support/medic. I even drop ammo on teammates as I go by them on my way to the next objective.
Yesterday, there were four of us holed up in the bunker within the forest map. I spammed ammo packs/crates, while a medic spammed med packs. We held off wave after wave of the other team and we won 1000 to 997. It was probably the best five to six minutes that I experienced in BF1 thus far.
PS - F the medics that don’t drop packs after a firefight.