Tirin took off at full speed. He was the first to a cover. He turned around and covered the running soldiers flank, firing as precisly as he could. He snagged a marksmen and tol him to take his position. Then he took off again to the tower.
Once there he took the remainder of the white power and poured it on the doors lock. After it vaporized Tirin opened the door and made sure it was clear.