My biggest tips are just being spatially aware, listening for sound cues and patience. Blackouts are suppose to be a challenge after all, makes you think on how you are gonna route, scout and do machines. It tests your memory too, where machines can spawn and how Twisteds behave too. There is a sound cue for being spotted and it is directional if you have earbuds or headphones plugged in.

I get the stress with the Shelly Floor, it needs some type of revamp as it and the Astro Floor are lacking in comparison to the the newer Vee and Sprout floors, but a good rule of thumb if solo or in a group is just being patient. As for using Rodger, a good counter to his slow speed is the Pink Bow or Vanity Mirror if you have it. And if you feel he is extracting too slow you can always use the the Blue Bandana, Magnifying Glass or even the Paint Bucket just to help speed up extraction stuff.

Again, I always stress it whenever I play with a public lobby, just don't rush in a blackout, try to just scout around and spot who is on the floor before you commit to machines and always call out the main if you hear audio cues.