----- This item will improve your Mortal Strike DC by 1 point while worn. ----- This item will grant you 3 uses of Thaumaturgic Venom a day. (Maybe 1 use of the each type of venom) ----- You must be level 70 to wear this item.
This looks like very weak in the hands of rangers, +2 dc once/minute instead of +1 dc always. And you have to bother recast it
For both classes I'd just keep recast foebane from spellbook while enjoying bonus dc from PoM gloves, if you consider you might rest every 5-10 minutes of real time it really doesn't take much to just fill your spellbook with Foebanes, maybe even devote a piece of gear/aug to more slots (definitely better than wearing 5%imms bracers with nothing else added).
Random comment unrelated to the item: You should just make a fresh thread whenever you change an item significantly - on top of easily alerting everyone that it's a new idea, right now it's a bit confusing whenever there are a bunch of posts commenting on the old and completely different idea (eg: the Bard Armor thread is filled with posts discussing XR boots ).