I just reselected my enhancements at level 12 now that I can get Tier 5 enhancements. One of the enhancements that I selected was Brilliance (ES tier 4). It doesn't seem to do anything.
I get the same number of temp HP from False Life that I used to get. I get the same number of temp HP from Stanch that I used to get.
Is it supposed to do something that I'm just not noticing? It certainly isn't giving me temp HP every time my aura ticks (which is what I originally read it as - and which seemed ridiculous).