I've been trying to get better with infestor usage. If I have just a couple of infestors, I seem to be able to use them OK against marine balls with a double-fungal. When I start getting 5+ infestors and trying to use them with zergling/roach to take on protoss balls/terran mech thor/hellion/tank compositions I am running into problems.
I normally have my lings/roaches on 1/2 and infestors on 3. I try to engage with lings/roaches and then tell the infestors to fungal, but with the delay from individual infestors moving into range and casting, the fungal doesn't always land on the targeted units.
Another problem is I frequently in the heat of battle end up mis-selecting and instead of my 3-f-click-f-click-f-click casting three fungals, I select some other unit by mistake and then my infestors proceed to mill around and die.
Before the neural parasite range nerf, I found it easy and effective vs void rays, tanks, colossuses etc. With the new short range I cannot seem to find a use for it. Any advice?
Finally with infested terrans it can be hard to spawn large numbers of eggs quickly, resulting in infestors being killed with high energy. I tired right clicking then shift+t queuing up large numbers, but then the infestors all cluster in a huddle trying to move into the "firing" position one at a time resulting in a slow deployment.