I will work the math on this tomorrow.
(dack from SWTOR MMOMechanics)
With a 2 min CD your 350 power for 30 secs averages out to 87.5 power per second. + 47 from the constant power and it's now 134.5. So it averages out to more power assuming you always use the trinket when it's up and then you can time certain things around it. As a marauder, I can time it + my adrenal + bloodthirst to get more bang for the buck then constant power from my WH relic.
I actually use one WH and one DG Relic now.