I'm glad you enjoy pvp as a Striker. That being said a Striker in any raid format is completely useless. I'm not trying to be a dick here, but it's absolutely true. Run your bounties and get your Defender up asap. If you are one of those people who is never going to want anything other than Striker unlocked then you will have to stick to pvp only content. Striker has n o business in the raid, and you will never get it done unless you find people who simply want to carry you through the raid for shits and giggles.