Yeah, it's not really about forging but it kinda goes with it. But what's up with not being able to set an invasion phase timer between 5 and 10 minutes? Sometimes 5 isn't enough and 10 is too much.
you have to build around the system, so if you need a 7 min timer, you'll have to change your map or make the objective longer you could give the defenders an extra vehicle or power weapon to make it harder