I'm running a Defender titan. Right now I've got the helm of Saint14, but I don't know whether the Armamentarium is better. I have a legendary helmet ready to replace my Helm of i decide to switch. The main purpose of my titan will be PvE; I have a Huntress for PvP. EDIT: I'm gonna grab the Chest, just because I'm not sure how often enemies walk into your bubble. Plus, I have some nice heavy weapons and it'd be nice to have more boom.