I have two questions.
First, Does magic weapon stack on a creature? meaning can i cast it twice on a creature?
Second, If i have two epic Storm Archers and two Nentyar Hunters, and one of my hunters activates does her thing and my two Epics take there rolls. (this i got) But if my second Hunter activates, does her thing, Do I get to roll for the Epic Storm Archers again???? I guess what I'm asking is does the Nentyar Hunters Commander Effect stack or do i have to ignore one?

From the War Drums rule book:

stacking: In general, spells and special abilities are cumulative (stack) with each other.
However, some exceptions exist.
No ongoing effect produced by a spell or special ability stacks with itself. It’s okay for multiple spells to each grant melee damage +5 to a creature, but a creature can’t get meleedamage +10 from two castings of bull’s strength. A creature with a named ability, such as Powerful Charge +5, that gains a more potent version of that ability (Powerful Charge +10) has only the more powerful version (Powerful Charge +10, not Powerful Charge +15). Commander Effects that grant bonuses or penalties to the same statistic never stack. A single follower can benefit from any number of Commander Effects at the same time, but if more than one grants modifiers to the same statistic, only the largest modifier applies. Bonuses and penalties granted by Commander Effects do stack with bonuses and penalties to the same statistics granted by other effects.

The answer to your second question is that each Nentyar Hunter's commander effect takes place during a different turn, so each works on its followers just fine (i.e. yes, the Storm Archers get the free attacks after each Hunter).

Dave

Number 3 wrong forum... !