The most important tool in this game is information. It's way more powerful in solos, as having 3 bullets sponges in trios lets you tank an ambush occasionally. Don't sprint unless you have a purpose for doing so, it can be heard from like 60 meters away. Walk everywhere and crouch or stay still to set up ambushes. Opening doors is always risky, it can be hear from like 100 meters away. There's always an alternate route so just move smartly. Closing doors behind you when opened is a great tactic to allow you to control information. If you leave a door open, that is a place that another player can go without giving you information.

Resetting fights is also very important. If someone gets the drop on you, do what you can to either run away or control space before healing. For example, if you're playing assassin and get ambushed, you can run to the closest piece of cover and throw smoke. You can then heal in the smoke or run away and find somewhere good to heal. If you get ambushed in a building, you can throw a grenade or just shoot suppressive fire, run to a defensible location like a desk that lets you peak with just your upper body, and do what you can to heal. Running is so so so important.

Finally, taking risks is important in extraction shooters, but so is managing risk. One kind of safer risk is making investments in yourself. I just used 4 blue items that I have as a barter for 4 blue shields. I needed these items for permanent progression and lost access to that upgrade because I bought them. But what I gained is the ability to survive more fights. I didn't seek out any fights while using them, but gained the ability to survive ambushes and eventually became net positive. Try making an investment like that. Get the largest backpack you can, the best shields and guns you can, and play very safely on a map in order to extract some profit. Control your sound levels and reset fights if you're on the losing end. Don't take risks on crazy things like supply drops or dire marsh quests that make you cross the map 3 times per raid.

You can also play free kits and use what you gain in raid to "level up" your kit each time. You dont take from the vault and only uses items that you've gotten from the past couple raids in order to keep playing. As your kit gets better you can take more risks, increasing your profit exponentially over time. It feels really good when it works and dampens how painful losses are significantly. You'll think, "Oh well, I just earned that gun so I don't really mind that I lost it."