The bone ringer off-hand in the cube is a huge damage boost too single target. The Travelers pledge and compass rose set are great for any pet build. Spam the skeletal mage and get to max 10.

Once you activate it on a monster, they will jump from enemy to enemy until the whole screen is dead. These 2 set bonuses make your skeletons go crazy.

The Frailty curse is very good, but i am mainly using it for its rune affected targets take %15 more dmg from minions. That effect combined with the weapon set (Command skeletons attacks a monster and automatically goes to a next, and while they are attacking you get a damage bonus to all minions). Using the Evol ring will give you 2 mages per summon to get to that 2500% extra damage for your pets. The 6 piece bonus of the Rathma set gives 250% damage per summoned skeletal mage. Many parts of the build proc of other parts of the build, I'll explain. Hello! This is a full pet/Cold build, that can clear 70+ with bad gear and low rank gems. Reduces the number of items needed for set bonuses by 1 (to a minimum of 2).

( 2) Set: When the target of your Command Skeletons dies, your skeletons are automatically commanded to attack a nearby target.While your skeletons are commanded to attack a target, you deal 400% increased damage. Reduces cooldown of all skills by 4 - 7%.

Diablo 3 pet gem necromancer