I'm a begginer, and I see people claiming that mortars and kobras are great for offence, and defense, yet I don't see it. When I try to leave my kobras and mortars on defense, they usually overshhot and don't hit anything, and they can't move effectively. When I try to use them for an attack, I find deploying and undeploying them a pain, and usually my lasers, dustscouts and gas inf move forwards while I have to micromanage them to deploy/undeploy to get in range again. Any advice using them effectively?