Predecessor Builds > Wraith > Wraith's Covid Vaccine.

You will be the nurse and the enemy Morgesh is the American. Just like the broken healthcare system, you will poke the enemy like a doctor with the Covid vaccine. Much like a right wing radical Morg will be screaming to resist, but baby it's mandatory.
If up against a bunch of tanks of course use demo but with the nerfs, I don't think it is a must buy anymore (or at least hope not. Now that Infernum has been nerfed and Nuclear rounds got haste, that knock knock will be coming back quick and hitting hard. The increased ability damage works wonders with nightfall to heal you and Solaris (the new item) give wraith every stat he likes. Knock Knock now benefits from lifesteal!!!!!
The ol' weaving auto's in-between his abilities was like it was born for Solaris. Solaris just got a buff and now heals as well.