Twilight had to smile. Of course the meathead would come up with that contraption. From what she knew of his abilities, his threshold for creating and maintaining constructs was somewhat limited. He would use up quite a bit of his reserves if that monstrosity actually packed the punch of an actual machine gun and they should be non-lethal anyway. As he created the gun, Twilight expanded the two shields already created into a strong but transparent wall that covered the entire team from all frontal fire while allowing them to slide under or go around the sides and move forward. Adam was spraying and praying, and rounds fired on full automatic were notoriously inaccurate. This was suppressing fire. Energy rounds spattered off of her shield and rebounded from her barrier, sending them chaotically in the opposite direction or dissipating completely against her wall. 

Juno had no intentions to allow her team to be pinned down however. While she gestured with one hand. The remnants and shards of her hailstorm of light spheres had not fully dissipated yet. With a smile she gathered all their energy together while she protected them team from the barrage. Her shield slowly shrunk as she gathered energy, conserving her power for both her counter-attack and the rest of the fight. Let Adam think his machine gun was wearing her down. The balls of hard light and heat coalesced behind the team as they hid behind Adam. A large bomb formed and rolled forward. 

Twilight's shield turned solid white and into a tight dome around her team as she floated back down to the ground. Then, with a gesture, the bomb detonated. It was an explosion of blinding light, burning heat, and pieces of hard light that would sting while a wave of force would blow anyone too close off of their feet and deafen them with the sound. Adam was sensitive to extreme stimulus and the bastard child of a flashbang and a concussive grenade turned up to eleven should do the trick. Meanwhile her shield protected her team from the effects of the blast. 

Her dome collapsed and Twilight levitated up, "Quantum, Molotov attack! Madcap go!" Twilight raised her hands and fired several beams of light in the general direction of the enemy team. If they connected they would blast the victim back and stun them for a bit but the barrage would help keep their heads down at least.