If you don't have a solo, STAY out of combat UNLESS you can make it one-sided.
Combat is lethal because NO human civilisation yet has figured out a way to not make bullets hurt lots.
Your combat remote techie is going to be your pointman. HE will call the shots.
Without a netrunner, though, a lot of stuff is just going to be next to impossible, though. They are one of the two most powerful character types in the game. The other is Fixer. Both are more indirect action, than head-on, but both yield more power than any solo.
They can be used to give you advanced warnings so that you can set up ambushes (hack security cameras). They can remotely lock/unlock doors to get you in/isolate bad guys. They can also take control of remotes for you.
Hey! Where'd ... Everybody ... go?