Ladder / SRT / parachute*. Moel Fferna is a great trip. Have a good one!
I've always found it a very easy pitch; and always rigged off the tree so the rope or ladder doesn't lie on the rock face.
It was made easier a few years back when Marty and gang put the metal ladder in - so the actual roped/electron descent is probably no more than 20 feet.
* Before anybody jumps on me... I was joking about the parachute...
my orders are to sit here and watch the world go by