I'd been playing around with a map that didn't have a SE PA + Berks combo for 6 seats, which works out very similarly to Blairite's effort:
PA-1: Bucks County plus 3 wards from NE Philly and change. Clinton 48.5-47.9. Shouldn't give Fitzgerald sleepless nights.
PA-2: North and NE Philly. 41.4% AA by CVAP, 33.5% white. Boyle wouldn't necessarily be doomed in a primary, but he certainly wouldn't welcome this map.
PA-3: South and West Philly, plus Darby township and a few other black-majority municipalities in Delaware. 49.8% AA by CVAP, 53.2% by total population.
PA-4: Montgomery County west of the Schuykill, plus Upper Merion township. Clinton 57.1-39.1.
PA-5: The bulk of Delaware County is combined with Main Line communities in Chester and Montgomery Counties. Clinton 59.3-37.3.
PA-6: Lancaster County and the south of Chester County. The tri-cut of Chester isn't lovely, but otherwise I think this is a reasonably cohesive district. Trump 53.2-42.0 and there isn't enough of Delaware County in here for this to trend towards competitiveness any time soon.
PA-7: Lehigh County, Northampton County and East Stroudsburg. Almost no changes from the current district. Clinton 48.3-48.0.
PA-8: I know Lackwanna, Luzerne, Monroe and Pike works, but I just think it makes the surrounding districts look awkward. This swaps East Stroudsburg for Wyoming, Wayne and bits of Susquehanna is accordingly significantly redder. Trump 55.0-42.0. Biden will have been a bit closer this year, but it's probably still too red for Cartwright even in an even year.
PA-9: Berks County, northern Chester, Schuykill County and Carbon County. The days when Tim Holden could hold down a district like this are long-gone, as Schuykill and Carbon are just too far gone for Democrats. Trump 56.0-39.9.
PA-10: My major problem with maps assigning 6 districts to Berks and SE PA is that it tends to lead to Harrisburg being separated from its hinterland. This map nicely avoids that and manages to create a district with the state capital at its centre. Swapping the city of York for Lebanon and Perry Counties ought to take this off the target map for Democrats. Trump 56.1-39.6
PA-11: The South-Central PA district. Monolithically Republican but lacks an incumbent.
PA-12: The North-Central PA district. The reddest on the map.
PA-13: Altoona, Johnstown and State College. Joyce and Howard both live here, so unless the former moves that means a primary contest.
PA-14: All of Fayette, Greene and Washington, most of Westmoreland and SW Allegheny. Trump 62.2-34.6.
PA-15: This is the new PA-18. It packs in Pittsburgh, all of its eastern suburbs and most of its southern suburbs. Clinton 63.8-32.7.
PA-16: Erie, most of Butler County and points in between. Outside Erie, there's too little blue turf to make this competitive. Trump 60.5-35.3.
PA-17: Compared to the current iteration, this swaps Mt. Lebanon and Penn Hills for Lawrence County and southern Butler County, the partisan consequences of which are fairly obvious. Trump 55.1-41.2, which is surely too red for Lamb.
Overall, despite having been drawn with little regard to partisan data, this is an excellent map for Republicans, since in most years it would return an 11R-D6 delegation.
EDIT: Whilst typing this up, I found I was a little unsatisfied with the orientation of my proposed PA-11, so I tweaked it a bit and accordingly rotated territory between PA-10, PA-11, PA-12, PA-13 and PA-16. I think it's a little neater, but the only significant change from an electoral standpoint is that PA-12 becomes the incumbent faceoff rather than PA-13. You can find that version here:
https://davesredistricting.org/join/37e82622-727f-4e5f-bf88-1b60adf95141
