Channel locks are easier if you plan on mangling it anyways. You don't even really need the pin spanner to remove if the cup isn't seized. The pin spanner is more for holding it in proper adjustment while tightening the locknut. Loosen the locknut, and you should be able to remove it with your fingers.

Also NDS is always a standard RH thread and I'm pretty sure it's a later internally brazed Peugeot so it's BSA and the cup says 1.37