According to the PHB, you don't add up all your Temp HPs from all sources...but what counts as a separate source?
For instance, both the Infernal Pact warlock and:
...boost THPs. Would you add all the THPs you gained from your pact boon in a combat, or would you just keep resetting?
Ditto the gloves: if you keep hitting marked enemies with arcane powers, do you keep resetting to +2THP or do you add +2THP for each one you hit?
IOW, are the Pact Boon or the item considered to be the "single source," or is each triggering of the boon or item a "single source."
For instance, both the Infernal Pact warlock and:
Gauntlets of Arcane Might (Heroic)
When you hit an enemy marked by you with an arcane attack power, you gain +2 temporary HP
...boost THPs. Would you add all the THPs you gained from your pact boon in a combat, or would you just keep resetting?
Ditto the gloves: if you keep hitting marked enemies with arcane powers, do you keep resetting to +2THP or do you add +2THP for each one you hit?
IOW, are the Pact Boon or the item considered to be the "single source," or is each triggering of the boon or item a "single source."