Nah, he'll stick it out since the benefits of getting in the full attack seems greater than a little burning. Simpler than retromoves anyway - my mistake for erasing the entire thing from my map after the area in the VZ was dispelled.
But now he'll try his luck with the sandstorm, and swing around to 80n80e and slap a bite on Litho as soon as he comes in range. Besides it amuses him that Litho retreated from full-attack range - sign of weakness, that.