I hate to say it, because I love MC rushing a hive as much as the next person, but turning FF off for a brief time, as an experiment, might not be a bad idea. A single skulk jumping into a group of rines can cause half of them to kill the other half which, while amusing for the skulk, makes it a bit difficult for the marines. It would be nice to see the overall W/L stats for a short time of no FF, see if it makes much of a difference.