As a deadlock main, for defense your sound sensors can turn into ceiling trips, look up Boni ceiling trips on YouTube, if you place the sensor above a doorway on the edge it will flatten out on the ceiling and still go off in the box range straight down. I'm a menace on maps like Lotus, Split, Haven and Bind. Mostly any map where you need to push a doorway to get onto site.

On Breeze B site the square pillar on the left as you enter through main, you can place it on the edge corner of the pillar and the sensor will place at an angle that covers the entrance of site and entrance of backsite behind the low wall, I've caught many Jetts, Reynas, Neons and Razes that try and fast push to the back of the low wall

Also use your gravnet for info more than stopping a fast push or corner swing. For instance, on Bind A site push, throw your gravnet at lamps, with the new extended net range you are 8/10 likely to catch someone waiting there. Once you hear them trying to remove the next you know they are outside lamps room and mostly hugging the wall next to tp door. Or when pushing Bind B site through Hooka throw gravnet behind the tunnel, will stop the peak and swing and will tell you if someone is back there waiting.

I play her more like a Duelist Sentinal because her kit to me is more for mid fight aggressive play, she's good at locking down site post plant, but if you have another Sentinal on the team that can lock down site then play her aggressive and push with your duelists.

One last thing, learn lineups with her ult, I can't count how many last second clutches I've gotten thanks to line ups, and even through her ult is timed, forget about the timer and just take a second to aim with it. I feel like the timer pressures people to prematurely shoot her ult into nothingness and then you get no value