Imo, each bomb site has at LEAST one good Solo Q Operator that will benefit your team, even if they're randoms. Example, Defending Ceo Office on Bank: Castle I don't win EVERY round I play Castle on this site. But I DO win more than half! Block off the two windows to Desk, the east-most Large window inside site, and last one is in your pocket. Pop a Pox Alarm at the top of middle stairs, and at the bottom of spiral stairs. Reinforce the soft wall by 2f elevator, and hide in there. Et voila! You now have control of most of the upper hall! You can peek between the flag and the wall to make a nasty angle, and you can hear if either prox alarm goes off! Like I said, this does NOT guarantee a win. But even with mediocre teammates, you have an even chance!
When I play deimos I like to go under the site and shoot from below as when you are playing deimos you get accurate tracking but when the enemy is getting tracked they only get periodic pings.
(Probably bad advice) but I like using echo, Lesion, nomad, mute, and smoke because theirs gun are either shotguns or have good recoil. To me, as long as I can kill the enemies, I’ll be good. I’m silver 5 and play casual😊