Thanks Buzy. I was looking at Kilmar Tor as well, looks fun on the aerial photos. Can you recommend a jumping off point where I can park?
I enjoy the walk in from Minions, then cross the Whithey Brook and return via Tregarrick tor. Nice view from there over Siblyback, plus lots of antiquities along the way, if you enjoy those? All open access though not much trodden, so you may need to climb the odd gate.
You can also park between stow hill and sharp tor tor or even simply park at the top of the lane just North east of Killmar tor itself. I sometimes park there in the summer, after work and then just head straight up on to the ridge and head along and back. You can make the ridge itself as hard or as easy as you like. There is proper climbing required to reach a few of the high points along it. But it is very shallow on the South side, so you can simply walk around any parts you do not fancy scrambling over.