I live in Southport and usually get over there via Burscough and Newburgh. I have done Parbold Hill but being the main road to the M6 it is very busy and an artic got stuck behind me as I struggled up at about 7 to 8 mph. I actuallly felt sorry for the lorry driver, not only did he have a big hill slowing him down, but he was also stuck behind me which slowed him down even more. I decided that in future I would go up Hunter's Hill instead. I did that yesterday, then turned right into Stoney Lane at the Rigbye Arms, which is the steep descent I was on about in #158. It looks like it would be a hellish climb, even more so than Hunter's Hill.
As you probably know, from the bottom of Stoney Lane, you can drop into Parbold, which I did, then went up to the Beacon, turning round at the Prince William and heading home via Skem and Aughton where I climbed Clieves Hill, thus completing my mini South West Lancs 3 peaks.
Some of those other climbs you mention - Bank Brow (Bank Top?), Crow Lane, also Roby Mill nearby - are reputedly brutal and make the beacon look easy, might need a bit more practice before taking them on.