I really really suck at crucible. I have had this bounty along with bad juju and invective for over a month without attempting due to my known lack of crucible skills. I decided to bite the bullet and and try to do them last night.( all three have crucible elements). I equipped a void fusion rife and fusion grenades from defender subclass of Titan and went at it all on control. I was able to complete all three in about 5 hours. Crucible pirtion of thirn took about 2.5-3hrs. Just try to stay positive if I can do it anyone can.