Game Mechanics Unique passive for each class

I have a suggestion on passives for classes to make them more unique in playstyle taking advantage of the off-hand/shield slot from 1.9 and onward client.
When you hover your mouse over the item in the off-hand it can give the stats of the passive, and in the Archers case if you right click the item it can resurrect the pet.
In the off-hand different classes can have a unique ability which encourages the intended playstyle of the class:

Warrior- has a shield which gets stronger with defense stat being able to counter mobs in order to encourage his front line playstyle.

Archer- has an item in off-hand which can summon a pet whose stats increase together with the player, like in WoW, to make up for his dashing playstyle, which can assist him in battle taking agro and following the player, the player can use a portion of his mana to resurrect or heal the pet in cities or before a boss fight in a dungeon.

Assassin- Can use a 2nd weapon in his off-hand, the sum of the 2 weapons damage is applied on the mob at the moment when its attacked, can be an interesting combo if the player equips 2 fabled weapons for their passive or just a mythic and an additional fabled for its passive. Encourages the risky playstyle of the assassin.

Mage- in his off-hand has an amulet which acts as a passive meter which builds up and automatically gives HP shield to the player based on a % of its max health while also giving extra Spell damage, the meter increases with the amount of spells used.

Shaman- in the off-hand has an amulet which acts as a passive meter which builds up and automatically gives HP shield to the player. On buffs applied to allies or himself the meter increases based on the amount of stats (HP regen, attack buff) the allies receive, enforcing the supportive playstyle of the Shaman class.

What do you think of these ideas and do you like these changes?
Can you think of a better passive for mage because it copies the Shaman passive?

 

soooo not a passive? just an offhand... which already exists-

But this completely disregards the current pet system. I get why you'd want pets to be stronger though. Seems worthy of a separate post to me.

I'd like to see this as a spell of sorts, possibly a major ID? Switching slots to use a "passive" which does something unique isn't a passive.

This is a straight up overpowered and silly suggestion.

Also seems too strong imo. Mage has huge sustain. You might've forgotten about the Concentration powder special (water % dmg boost for mana used)

Not sure I quite understand this one. But same as mage. I think passive amulets which go in your inventory for all classes is enough of a passive stat boost IMO.

TL:DR all classes have strong utility or a passive already. I'd like to see amulets added ;>