Teamwork is key when duoing with another tank you can basicly hard carry alot of matches.
Zarya, Dva are very good at denying space roadhog is good at shutting down targets, your gf likes to play space takers and distruptors.
To get a feel down on what to improve is coordination.
Your main objective is to protect those around you, you will constantly have to check for potential threats this means you will be on the front lines and backlines at the same time, cooldown management is key for your success and fast reaction/prediction is required, if you want to climb.
If you find that dva or zarya aint cutting it roadhog is there to shut down the biggest threat so be good at his hooks.
Dva has high mobilty and is practicly a babysitter her main objective is doing everything at the same time this can be tough and alot of tanks can tunnel vision with her, but mastering her jet is key. You use matrix to block incoming damage at your teammates so having a fast reaction speed by reading bullet projectiles and eating it up is very important if there is roadhog keep an eye out for hooks and dive at him and matrix it up so your hooked allies don’t die to it. (practicly it shuts him down 100% of the time)
If there is a bastion you can coordnate with your gf and dive at him using matrix dive either winston or rein will do just keep matrix up half way so you don’t blow up.
Zarya is great at space denying she focuses her beam on targets who dare gets close to her, bubble managment is key if you want to get good with her, read enemy bullet projectile and try to gobble as much burst dmg as possible, timing is key, and can save or break your partner if timed incorrectly.
Use her projectiles to deny space that your partner can’t reach and always use it intermittent with your beam attacks, stacking her ult can be difficult which is important to master her projectiles and hit multiple targets. Seek for natural barrier or walls and if a close range shooter dares to get close to your main tank shut them down. Tracking discipline is highly expected if you want to climb with her.
If there is a doom you can deny him by beaming him down, bubble will make dooms damage no-existent making your teammates take no damage. Reaper symetra and hanzo are anoying for your main tank so keep bubble up if they try to engage on your tank. (oh and soldier cassidy as well)
Roadhog is good at shutting down oppenents that you deemed need to be taken care.
Target priotization is important and mastering the hook is key to success.
He’s very good at breaking barriers but is far more effective in flanking and counter flanking.
Reinhardt is very effective at taking space she must manage her shield and aggro, crowd control is key and having the opressive nature of dominating your openents is important knowing your limits, is what breaks or make your rein, seizing opportunities is what rein excels at, any mistake your openents makes you punish them.
She takes the leads and dictates the pacing of the match, if your supports can’t keep up, play around it or drop the pacing speed, keeping with tempo with supports is key if you are out of sight she’s too deep if they are too close you are too passive.
Winston is great at disrupting he plays almost like a assasin, his main prioty should be to kill the squishies, mastering leap is key.
She has to master leap+punch+zap to oneshot a target.
Using advantaguos spots where your enemies can’t reach you is important so space yourself into a good position where you can zap freely and they can’t a do a thing.
Shutting down supports is important because its near impossible to kill a target if there is a support healing it.
Barrier managment is key using a barrier to isolate a target from doing anything is important (fun fact you can make a pharah kill herself with your barrier)
If you see a target low, priotize it, if you think you can pull it off.
Don’t jump into 4-6 man dive, seek for isolated targets and duel them. If the whole team chases you, leap away immediatly.
Map knowlege, map awarness, Crowd control, pacing, and coordination is what is truly important here. If you master this dps doesn’t matter. Its just a extra now.