You can get to the ceiling using both Poison Mine and Shield Arm.
The Mine is good for Run and Hit tactics.
2 points of Armor nulls the Machine Gun damage.
Drones could be equipped a Weapon but deal only half Damage, using 2 of them on a ship would be useful, Healing Drone should take 10 seconds to heal half HP, a Bomb generator would produce a Bomb every 10 seconds, for Survival.