I 100% don't believe you have the platinum seeing as how you don't have a Titan therefore you don't have the Titan mastery trophy. My PSN ID is J-Fudz add me and let me see for myself. Even if you did have all the trophies that means nothing. You can get all the trophies without entering the crucible once as a Titan. I'm 110% certain you're wrong. There is a perk in the striker class that makes you harder to kill while activating FoH. Why would there be a perk if it wasn't possible to kill a Titan activating it's super? So without that perk it is even easier to kill them, proving they can be killed. Anything else you wanna try?