To avoid Mucklows Hill if going towards Brierley/Merry hill I like going down Long Lane towards Blackheath but cut out Blackheath town by taking a left onto Springfield Road and through to Beeches road. Then it's down the longer, less steep alternative to Waterfall Lane (Perry Park Road - easily the most cycle friendly way of getting back up the hill towards Brum). It's a really nice quiet route, even in rush hour. Still need to do Quarry Bonk though!