Griffolian

What is the best team oriented defender type? I want to be the best and most useful group member i can be and don't care about damage. I don't know a whole heck of alot about defender primary/secondaries but was thinking empath/dark or kinetic/dark they both seem to be very team oriented. If anyone can make some suggestions please do so and if you can post a build that would be even better

Anyone got a guide for MA/SR or MA/Ninjitsu? All i'm really looking for is a lvling guide like what skills i should take and slotting and power pools.