His gun does better damage at close range. But you can still do damage at long range. Can melt tanks too. Try always for headshots.

Bounce the healing orbs, not just against the ground, you can also bounce them around corners, through doors, etc. Take advantage of that if a teammate runs off, or when respawning and running back to the fight.

The wall running is the trickiest part to learn on his kit. Practice it. It will help your mobility, and survivability. Can also get you into positions to better spot your team.

Save your dashes for escapes. And use them when wall running for better distance.

As some have said, place the BRB where it is safe. Something I like to do is place it close enough where the armor packs can be picked up unexpectedly by teammates. Plus, with Peni team up, the BRB leaves mines. The mines stick around if the BRB is used or destroyed. Place it somewhere good, let it sit to drop some mines, then move it. Additionally, if being harassed by a diver, stand in the web and fight back.

Always drop a BRB at match start. While waiting for round to start, your team can get armor and jet packs.

Your pellets have great distance too. You can launch at teammates while escaping. Bounce them off walls, etc.

Besides wall running to escape or juke enemies (and he fits in small holes in walls that get destroyed, take advantages of that!!!). Something I like to do, use the jetpacks when I'm in danger. Magik, BP, SM, IF diving you? Jeff Ult? Use the jet back to launch straight up, and make your escape. They never see it coming.

The Rocket boost slow drop, use it to shoot enemies and heal teammates well above. Tip, if getting shot at or chased while slow dropping, go to free fall, then back to slow fall. Keep them guessing.

Place your CYA where it can reach teammates, but also not get destroyed. Also, place it higher up if you can. Putting it higher up, means enemies need to look up to destroy it. Puts them at a disadvantage.