So it looks like, from I'm seeing in this thread, that for a Watchman Sentinel that can run EC NiM and TFB HM that the BiS relics are:
1. Dread Guard Internal/Elemental Proc Relic
2. Dread Guard Relic of Boundless Ages
Is this correct? And I'm currently running a internal proc relic and my matrix cube. What relics should I be using for progression ops.
See my post above about crit rating, it appears like elemental is for force users and internal is for tech. I'm not 100% sure, but you should take it into consideration before getting one relic over another.