Need help modding my gear

omnius

I'm pretty lost on how to slot my Heroic set so I'd love any suggestions. These are the pieces to put mods in:

Primary Offense: Heroic Gloves of Precision
Offense slot?
Enhancement slot?
Enhancement slot?

Primary Defense: Heroic Breastplate of Greater Health
Armoring?
Armoring?
Defense?

Primary Utility: Heroic Helm of Efficiency
Enhancement?
Armoring?
Utility?

If it makes any difference to the above, my secondaries are all going to be Armadillo

And this is the character build:

Infernal - Freeform (Ranged Damage)
v3.44:37

Super Stats
Level 6: Ego (Primary)
Level 10: Endurance (Secondary)
Level 15: Constitution (Secondary)

Talents
Level 1: The Scourge (Con: 10, Ego: 10, Rec: 10, End: 8)
Level 6: Daredevil (Ego: 5, End: 5)
Level 9: Worldly (Ego: 5, Rec: 5)
Level 12: Amazing Stamina (Rec: 5, End: 5)
Level 15: Quick Recovery (Con: 5, Rec: 5)
Level 18: Boundless Reserves (Con: 5, End: 5)
Level 21: Ascetic (Con: 5, Ego: 5)

Powers
Level 1: Infernal Bolts
Level 1: Infernal Blast (Rank 2, Rank 3)
Level 6: Aspect of the Infernal
Level 8: Epidemic (Rank 2, Rank 3)
Level 11: Mephitic
Level 14: Pestilence (Rank 2, Rank 3)
Level 17: Defile (Rank 2, Rank 3)
Level 20: Endorphin Rush (Rank 2, Rank 3)
Level 23: Will-o'-the-Wisp (Guide, Ghost Fire)
Level 26: Resurgence (Rank 2)
Level 29: Energy Shield (Rank 2, Rank 3)
Level 32: Entrancing
Level 35: Corrosive Pit (Rank 2, Rank 3)
Level 38: Fiery Embrace
Adv. Points: 36/36

Travel Powers
Level 6: Jet Pack (Rank 2, Rank 3)
Level 35: Athletics

Specializations
Ego: Force of Will (2/2)
Ego: Insight (3/3)
Ego: Follow Through (3/3)
Ego: Sixth Sense (2/3)
Guardian: Fortified Gear (3/3)
Guardian: Ruthless (2/2)
Guardian: Find the Mark (3/3)
Guardian: The Best Defense (2/3)
Vindicator: Aggressive Stance (2/2)
Vindicator: Merciless (3/3)
Vindicator: Focused Strikes (3/3)
Vindicator: Mass Destruction (2/3)
Mastery: Ego Mastery (1/1)

Devices