I was thinking of using Hardwired to counter the EMP users but I don't want to waste a slot for that perk. I just use a crosshair sticker on my gaming monitor so I won't get disoriented when my Target Finder gets EMP'd.
This is how my monitor looks like with the crosshair.
I do much better with irons or the RDS, stock is the only essential attachment. I hate losing my peripheral vision.
I don't corner camp with LMGs, however I'll pick somewhere with good sight lines that I can defend, for example the statue square on Raid. I use them because I like to keep my engagements at range where possible, and in this game it just seems like no matter how many you kill there's always another one. At least with 100 bullets I should be able to hold them off.
I've heard people are having off days with the hit detection on the Ballista and it's only happened in one engagement with me thankfully. I shot someone in their face only to then get killed by the enemy. I actually find the XPR a bit more difficult to use in terms of 'raw handling' having used the Ballista for a fair bit. Snipers don't tend to dominate in lobbies really from my experience, unless you're pro with them then. I've topped lobby leaderboards when sniping but most of my kills will be from the pistol upon relocating.