I am currently using my Titan with the The Taikonaut helmet and the FWC Rocket Launcher. Both items have the ability that makes your rockets track it's target, but for some reason, when both of these items are equipped, the target tracking ability doesn't work. I have to equip another weapon, then re-equip my FWC RL, and then the ability works again.
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Why would you waste an exotic slot if you already have a tracking rocket?