You are probably better off not tailoring to avoid a 7/10000 chance on being parried and instead put that .5% into a more useful stat like mastery or haste.
But yeah this is personal opinion.
EDIT: Did they change Jewelcrafter gems so you can only use 2? I was definitely using 3 in cata...
EDIT 2: Ninaran, you would probably be better off using a [Ghost Iron Dragonling] over Lessons of the Darkmaster. That way you can socket almost the same amount of expertise with room for 1200+ useful stats which will be more beneficial than that strength proc, for example +600 Expertise/+600 Haste/+600 Mastery.