Good luck. You will need it.
He pointed to the class insignias. "And forget what you know about classes. We don't have generic riflemen anymore. We have specialists. Gunners. Shinobi. Engineers. You need to build a squad that covers every angle. xcom 2 long war guide
You will be tempted to give the Shinobi a sword. Don't. Give them a SMG and every stealth perk. Their job is to move three tiles ahead of the squad, spot pods, and never enter combat . A Shinobi who fires a shot is a failed Shinobi. Their purpose is to let your Sharpshooter use Squadsight to shoot a Sectoid from 40 tiles away before the pod activates. Good luck