It seems as if addition values for items with small spirit resist values may not be working correctly. There seems to be diminishing returns when adding +X% spirit resist items, as shown by the examples below:
As seen here, Restorative locket (8%) + mystic reach (5%) + mystic vulnerability...
The damage from Pocket's Enchanter's Satchel is supposed to be triggered when taking any action as indicated by the tooltip, but when taking a pre-cast flying cloak teleport while in the satchel, the damage does not go off. Easily testable in sandbox mode.