You starting at Loggerheads? I’ve always gone up from Cilcain side, given that mrsmidlife’s mum had a farm there.
Out from the pub, past the church, round to meet the Garth road, on for 100 yds to Cae Newydd then pretty much straight up over the fields if you’re walking or can ride a bike up very steep things. You can also head further up the Garth road but you still come to a steep bit. Other option is to head south from Cilcain on the Loggerheads road, then up past Brithdir which will take you into the forestry and you can contour up a bit easier on the forestry roads. If you’re walking you can come back down to Loggerheads and follow the Leete back to Pantymwyn and then down and through Hesp Alyn farm(bridleway, but the owner keeps hiding the signs) and back up to Cilcain avoiding Trial Hill.