Deployable Combat Turrets

Turrets that can be placed just before or during combat which would really fit in with all the other recent 'tinker' related stuff.

Key characteristics:
-Able to attack all around like minions and pets do (or less to make placing these turrets more strategic)
-Doesn't need to be powered by an adjacent power source

There are a number of possible categories for these turrets but instead here's one: consumables. As consumables, it provides a reasonable explanation for why these turrets can operate by themselves if only for a limited time, and could justify these being stronger than stationary turrets if again only as a limited time, consumable object. As consumables, it would require a steady stream of resources much like the consumable bombs and potions, setting these turrets apart from traditionally summoning minions via magic or raising pets.

Add-ons:
-Off-hand for focusing nearby turrets onto a target or direction
-Repair(?) item/equipment for upkeep