Okay, so that Locust is... probably one of the hardest to work with. You can start, though, by switching your twin HMGs to quad LMGs. It's not what that Locust does best, IMO, but the loadout I would go with (a single Large Pulse Laser) requires an XL180 or 190 to run right. In the absence of a lot of money, you can take the LMGs instead and do some work. Bring your arms up to 10 armor each, your head down to 2 armor, and grab an extra half ton of ammo for the LMGs.
For a Locust, you're going to be incredibly slow... but this will be viable -enough.- Refrain from poking unless you're poking WITH someone else. In fact, what you'll want to do is constantly be running with other people. Find the bulk of your force and stick with them. When they shoot someone, target that person and find out what portion of their mech took damage and fire your laser. If you find a mech that has had its armor stripped in any torso location, target that spot and let loose with your machine guns if you're within 500m. Your goal here is mostly to strip out the internals of a location, making that mech less able to kill your bigger friends. If you ever have someone turn their back to you, aim for the CT with the laser and strip the armor, then get to work with the LMGs. Don't ever stand still for very long, though, keep in motion as much as possible, even if it's just rocking back and forth so you have some initial acceleration in case you need to get out of dodge.
[Edit]: As a side note, the Trial Nova actually is a -reasonably- good mech. Its armor balance is wonky, but depending on your tier the triple AMS may help a lot if you're still learning how to avoid death by LRM.
Edited by Verilligo, 08 September 2017 - 07:26 AM.