Great choice of pubs but a bit spread out for a crawl using public transport alone. Pardoes is only on one bus route - the 243/244 from Dudley to Merry Hill.
The Bull & Bladder is relatively close to Merry Hill - about a 10 min walk and it is the start of the " Delph run"
The Crooked House is a quirky and unique pub. Well worth a visit but really out of the way.
Most of the local taxi firms round here have a couple of people carriers but make sure you specifically ask for one or they will send the usual old knacker !
Might I just add that if you are going in the Britannia it seems a shame not to visit the Jolly Crispin which is just up the road.
The Black Country has a lot of good pubs ( and loads of average ones ) spread over a large area - I suggest that you stay for a week or so to do it justice !!!