Learn the vertical drop in practice range. Spamz at headshot range. Hope for the best. Often times you’d be shooting a junkrat but somehow one tap a Kiriko behind. Take that as a validation of your skills.

Also use your mobility ( wall climb) to get a nice off angle at an unsuspecting Ana and win the team fight.

His ult is borderline useless - so use it to block rezzes, zone out tank from backline or even take pressure of your tank.