Most things are in git so work is local; for servers where I have ssh/sftp access I use Transmit to locally edit files using Sublime. It's usually seamless, unless you switch network connections in the middle of a save.

But a lot of the time, I am running vim on the remote server... no simple substitute unless you install some sort of channel to be able to edit locally, or have it available via SFTP (especially with sudo, that's often not possible).