There’s some good stuff, I’d have a look at the segments already on strava.
Pylon descent to saunton is fun, rocky bottom is fun, north Buckland rocky decent is fun.
Order the Braunton/ croyde one of these
http://www.croydecycle.co.uk/mapsandguides.htm#cyclemaps
All the main bridle ways are on there. It’s a case of linking stuff up by road. There are some cheekier trails but they are better at times of the year when there aren’t as many tourists/ walkers about.
Or drive 40 mins to exmoor, the valley of the rocks/ lynbridge ride is great. It’s in single track here
http://singletrackworld.com/magarchive/issue-69/
Or email me too!