For my titan bros out there not buying into the whole "Titans are only for distracting boomers" My build focuses on the defender subclass with max possible armor and agility. You'll be using the lift jump because you can jump straight from the group up to crota with no difficulty at all. Then set the bubble up with blessing of light, and illuminated so you can tank some crota and boomer shells if you need too as well. You won't be staying the bubble for long or be going back to it so put relentless on instead of bastion for extra force barrier incase you get the chance to use it. Don't risk killing yourself just get forcebarrier up though. The helm of saint 14 is really useful for this strategy, but you don't need it. You can run armor of light and make by without it but you sacrifice your overshield on the way up. Which shouldn't be necessary if the boomers are being taken care of.