Posting it here so I don't clog up the liveposting thread.I've completed the DLC thrice now.
Cold Greatsword and Savage Lion Claw was probably the hardest route.
Black Steel Greatshield/Verdegris Greatshield/Fingerprint Stone Shield with Blood Antspur/Frozen Needle was the easiest. Poking everything from behind a Greatshield was peak.
But yeah, I haven't had much time to play the DLC but it's very apparent that slow mongoloid weapons get cucked in the DLC because bosses have such short recovery frames that they'll hit you if you hit them with a slow weapon. So far I've cleared up to all 3 of the bosses in the Shadow Keep (Mesmer/Gaius/Sunflower) but I haven't had the time to fight them.