The main gimmick is Gravity Barriers. Bring monsters with NGB to move freely. There are some mines but they are avoidable and don't deal too much damage. They don't deal a lot of damage and are at the corners of the map but it's a good idea to get rid of them. The Specter has a Counter Mode that when proc'ed fire a Gauge Disruptor at the Mini Boss/Boss direction. It's a good idea to bring monsters with base NGB + Flight/MS to ignore the Counter Mode.