I've only used it as a Ghost Ark, but the GA is amazing right now. Decent firepower, fairly resilient with Quantum Shielding. But the Reanimation Protocol reroll is great for armies with lots of Warriors. It forces your enemy to focus your Warriors down or they just come right back. Makes them very tough to remove from objectives or just to stop from killing their stuff. But looking at it's stats, it looks a bit weak for the points (like everything we have). D3 shots means you really need a few to make sure you can put out some pain. But comparing to something like an Onager Dunecrawler with Neutron Laser, it is going to do less damage while costing more. That said, bringing a few might be the best option we have right now.