Xigbar was not planning to make it back to the ground until the fight was over. Everybody could fight on the ground, but only the privileged few --well, the privileged one in this case-- could fight suspended upside down in the air. There was no reason for him to give up his element. Speaking of his element--
Flicking out of sight before the blue dart could hit him, he appeared again a few feet away, tugging up the hem of his coat to brush off the ice. What, was this guy like Vexen or something? "Oopsy daisy. How did you do that?" he called cheerfully, before he raised his guns again. The barrage he sent at Cid this time though seemed almost lazy and badly aimed, like he was gunning for something behind the other. Before the snipes could pass him however, and hit the things behind him, Xigbar tightened the space, increasing it's density, causing the bolts the ricochet back to Cid.