Influence is a Guild Resource used in Stronghold upgrades. The resource itself can only be earned by running Heroic Encounter’s (and a quest or two) in your Guild, or an Alliance Guild’s, Stronghold.
The amount earned is static and diminishes as you complete more Heroic Encounters.
[mkb-warning]Demonic Heroic Encounter’s DO NOT provide Influence/Shards, and are inherently worthless within the Stronghold (unless you need Underdark currency).[/mkb-warning]
Completing 5 Heroic Encounter’s fills your Daily Maximum Influence.
150 -> 120 – > 75 -> 35 -> 20 = 400 total Influence per day. (800 during 2x Influence.)