Entry One:
They're picking up speed. They plan an attack in secret, with a small group, and when they need the rest of the crew, they inform them of only what they need to know. No one seems to notice this, or complains about their lack of knowledge. They only seem concerned with rescuing the others who are to be unwound.
Still undercover- no one knows who I really am.
HQ is still armed with the buried mines outside and there are many who keep guard on the outside walls. Aerial attacks and entry is still not suggested, as there are some who are capable of flying and have been trained in combat. They have many weapons, as they have metal elementals and those who practice transmutation (referred to as alchemists) to create arms. Dome and walls are heavily reinforced and a new layer is added every week or so to prevent any sand damage or even aerial attacks.
Numbers grow every time a raid is done, but not everyone fights or goes out. Some stay behind and live within the walls and dome. These people are untrained in combat, but they are top-notch in basic survival.
Very little is still known about Vat.
Summary: Attack is not suggested on HQ. Faster arrival time to raid locations is required. More armor on transport guards and weapons that react faster are suggested.