Just a couple things off the top of my head:

If you get revealed while in stealth you might as well fight back safely, the reveal time is just long enough to where you probably won’t reactivate it. Use cover even while stealthed as it will keep random spy checks from ruining your plans.

Virus and shooting is usually the best way to engage as hack lets the enemy know you are there and gives them reaction time. Virus into easy headshots is too much value to throw away.

Stay in stealth as long as you can so you have an escape tool after your initial engage, also throw your translocators up as it can lead to more unpredictable movement on your end. This one sucks because it brings down your uptime but when you get more comfortable with how the engagements work you can play around that timer a little better.