Getting better and better in my Locusts. With my single ERLL M & S 300-400 damage games are starting to become regular, as do the assists and kills. I've even been last survivor and highest damage dealer in some games and am starting to get comments on it in the after battle screen.
I use them as energy support builds. Only sniping at long range to distract, usually operating at medium range and dealing good damage to engaged enemies and sometimes just running in and land that shot on an exposed location.
My 1V is completely different with its ML and 4 MG's. As previously said it's a waiting game in the beginning of the match, which is hard on me as I start to feel like I'm not contributing to the team rather quick.
So I usually spend my time cycling targets looking for those exposed locations (especially on ammo builds of course, I'm not really interested in that ERPPC x2 K2 with an open side torso) and scouting for enemy mechs and keeping locks on them for Lrm's (rather dangerous in a non-ECM mech IMO).
But as soon as there's a good target it's like "Locust missile away!" and I'm homing in to destroy that component, relying on my speed to get me in and out again alive.
And like IraqiWalker said you can be a great distraction versus a huddle of enemy Heavies/Assault. They can get extremely spooked when they start to hear the chatter of those 4 MG's and all the bullets pinging of them.
Last week I soloed a Victor. Turned out he was rather contemptuous about using a proper amount of back armour for that ammo carrying side torso. ML eats it way through, MG's finish the job, booom, just took out 4 times my own weight. Time for that 2 bed, 2 bath home on Outreach.