Even with IntelliJ and IdeaVim, if you ever need Sublime Text, you can easily switch to it temporarily using IntelliJ's External Editors feature. This will let you edit the file neatly in the external editor and return easily to the IntelliJ window.

Go to Preferences > Tools > External Editors

Add a new entry called Sublime Text

Turn off ‘Open Console’

Set program to /Applications/Sublime Text.app/Contents/SharedSupport/bin/subl

Set Parameters to $FilePath$