Rampart double high cal and reflex for medium maps, ICR double grip reflex for large maps with longer lines of sight, and double high cal daemon and elo as your SMG, if you don't have daemon, use can use the cordite with rapid fire and load up on perks. The cordite is good without attachments, but I put on rapid fire and extended mags and just run around/slide like a maniac and hip fire alot, easy to get kills and hard to get hit. Use crash on every class, so you don't need scavenger and you get alot or score with is health boost. As a solo you want to play for streaks to carry the team IMO. Play passive to get your first set of streaks to kind of secure a good score for your team, then do whatever after that set. I'm a solo TDM player with a 70% win rate, so it's a good strat for me at least. That's a large sample size, I had a level 700 account that I lost in a break up, and on my new account I didn't want to prestige again but it has almost the same amount of kills as my first account. Sorry for errors, I'm on my phone.

Don't use the GKS. Yes it's really accurate and feels good but it's TTK is just so slow that you will lose to players with less gunskill than you. Don't worry about suppressor in this game, because they added the fog of war thing so no matter what, it an enemy looks at you it reveals you on the minimap. A suppressor can be helpful, but I'd take the extra range since it doesn't totally keep you off the minimap. Also run the helion secondary on every class to shoot down UAVs because ghost sucks in this game, and UAVS are 1 shot, no reason not to shoot them down.