Snowden ranger youth hostel. Book a twin room for some privacy. Ride from the door up the zig zag rangers start upto the top of the start of telegraph valley descent, down there, right on the FP and you are at the end of the horrible road climb up past and more or less the start of the llanberis climb.
Leaves you with a belting singletrack descent right back to the youth hostel which is a good bit that gets missed if you do the standard loop starting from llanberis. Yes a bit more climbing overall but breaks it up a bit with climb, descent, summit, descent all the way home.