I am using language-rust, linter-rust, racer (autocomplete) and atom-beautify on a rustup installation. Setting up the paths took a while but it works pretty well. I did also try to switch to Tokamak a while ago, but that didn't work for me.
I'm running my rust code in a separate zsh window which is tiled the side by some Gnome addon and always visible (I don't feel ready to go i3). With a file tree, a code view, a minimap and a terminal window there are four columns in total and it feels a bit cramped at times. When I don't have a big monitor attached to my laptop I run atom in fullscreen.