As of MEW version 5.6.6-hotfix1 FUSE has been added as a supported network in MEW. You can manage your native FUSE with all the creature comforts MEW offers, it also allows hardware wallet support.
To set up Fuse Network on MEW click on "change" under network section at the top right corner, to change the current
A popup will open. Scroll down the list until you find "FUSE".
Click "Fuse Network" text/button
Now you're connected to Fuse and can use it's full features and products.
For more info about using MEW please refer to their documentation here.