That's actually one of the easier Strikes IMO. The reason I say it's easier is because the mobs are actually pretty easy to control. A single Titan can take full mob aggro while the other Guardians unleash hell. I suggest both non Titan Guardians hangout near the left and right outskirts of the map. The Titan will remain near the entrance of the arena and should take full aggro of the mobs that spawn there, the bubble shield Sub-Class is a must. Prior to making the boss unchained I suggest that everyone kill the starting mob. Once that has been completed the two non Titan guardians will move to the right and left outskirts. Those guardians should NOT shoot the mob near the Titan, they should focus on the Hive that arrive via the ship and should do so quickly. If one of the two outskirt Guardians gets overwhelmed by the Hive the player on the opposite side should take aggro of the boss so the other player can kill the Hive. There will times that Wizards spawn away from the Titan, they need to be dealt with quickly and I suggest keeping a Fusion rifle with 4 rounds at all times in case this does occur. Use the Fusion rifle to pop the Wizard's shield and finish them off with your primary. As long as each Guardian does his/her job you will have no problems finishing the Strike quickly. I have used this strategy numerous times on the level 24 variant. Hope that helps, I also have a strategy that I use when playing alone.