For the most part I will stick near my squad but I often see randoms engaging enemies even before they get a body shield. Yeah, no, I'm not going to even try carrying players like that. Would rather just try to use them as a meatshield and run off solo while I gather more supplies for the inevitable 1v3. Get a couple of frags before my death.
When I get a team that pings high-interest items and shows some initiative (e.g. not ignoring body shield pings when they have no body shield, etc.), not firing on enemies just because the enemy was pinged (sometimes it's better to not engage an enemy that doesn't see you), I will play with them to the best of my ability.
In my experience, Wraith mains are truly the edge-lord Solo Players that just have to be the ones calling shots and leading the way, mindlessly running into battle and getting downed (then promptly disconnecting) or generally doing their own thing. Not saying ALL of the time, but usually. For some reason that character attracts all of the Kiritos.
I've had a few Wraith mains set up some nice flanks with the portal and save the squad or get my slow butt out of the ring but USUALLY when there is a Wraith player they don't play as a team.