David, I’m not sure about Raven Crag, the only Raven Crag I can see on the map is off Glaramara, which although in approximately the right ball-park is quite a long way off the route I described!
Anyway, I think you might be looking up to Windy Gap via Aaron Slack? My route is from the bottom of Scarth Gap out of Ennerdale to Great Gable. When I got into Ennerdale Black Sail looked steep and Kirk Fell looked un-rideable for a lot of the descent towards Great Gable. If you look up Ennerdale valley towards Green Gable, there’s a line of glacial moraine that runs down from Green Gable. It looked an easier push up there than going over Kirk Fell. So I headed that way. It’s know as The Tongue, but not labelled as such on OS maps. The path is on the map, though I lost it part way up where it bears right and aims straight at Windy Gap.
It had been my intention to go over Green Gable onto Great Gable, having run it previously. However I had forgotten how steep it is going along Windy Gap, so aborted that idea! If you’ve not been, it’s too close to being a cliff going up onto Great Gable!
So instead, I picked up Moses Trod somewhere around Gillercomb Head and followed that path South past Green Gable, past Windy Gap in the direction of Kirk Fell, then turned left and climbed onto Great Gable.
It’s not a great climb, but I’m confident it’s the easiest way of getting up there from Ennerdale. I didn’t think much of the Scarth Gap descent, so if I was doing it again I’d probably go over Haystacks to get onto Moses Trod though.
Hope that makes sense?