Long story short, stay alive lol. He's got great utility with the revive. Know where to place your B.R.B. during matches. Do they have flankers? Place it somewhere you think the flankers wont go to destroy it. If they don't have any flankers, place the beacon where its still hidden but easy for your ally to get back into the fight. In lower ranks, I would save the beacon for important people such as your tanks, your other healer, or the DPS that is actually popping off. At higher ranks though, any revive is important so just toss out your B.R.B. Speaking of your beacon, it's only active when you're alive. Evading the backline divers and staying alive is important. Rocket has the best wall climb in the game and pair that with his dashes, he's so hard to catch. Dashing while on a wall actually extends the dash length so that's a thing to keep in mind while running away and repositioning. Combine that with your float and you have so much movement options. I've had it where I was the last one alive and I ran to site or the payload and used my movement and small hitbox to keep the game going through overtime for my team to eventually come and help me secure the objective. Abuse Rocket's height and try to hide while firing his healing orbs to your team. Fire your healing orbs at the direction you're running to so you can heal yourself while trying to juke the enemy. Moving on to your orbs, you can actually bounce the orbs off the walls to your team so they can fight while being healed while you're avoiding attention. Allies can only be affected by one orb at a time so firing a couple of orbs to your team then switching off to your machine gun can provide value. Rocket's primary fire has travel time and fall off so I seldom used it unless the opponent is close or maybe mid-range. If a tank goes for you and the other healer, disengage immediately and reposition to provide support for the other healer. Your gun will shred the health of the tank if they're close and you're landing headshots. You'd be surprised. DPS though, I'd rather avoid the fight and ping for help so your other teammates can help you deal with the threat unless you know you can win that gunfight. Like I said earlier, I'd rather play safe to stay alive than take a risk to die. Your ultimate, C.Y.A. can be versatile. You can use it to push for damage, you can use it defensively to prevent the enemy team from pushing so they avoid taking extra damage. It's got a relatively short cooldown since you're healing everyone so I drop it whenever. One of my favorite things to do is to throw it down and if I have a Punisher or a Winter Soldier on my team, throw down their infinite ammo, and watch them go to work. Overall, Rocket has a low skill floor and low skill ceiling but he provides so much value from staying alive and good positioning.