The best in slot items I have found for miner are as follows

Head - Felt Coif of Toiling +1 (26 percept) You can slot mnd
Chest - Woolen Doublet of Vit (18 percept) You can slot vit, HQ only increases the magic craft/vit (depending if you want vit) and not the percept
Waist - Raptor Skin Survival Belt +1 (14 percept)
Legs - Raptorskin Culottes of the Mind / Ul'dahn Culottes (8 percept) / Linen Bottom +1 (8 percept) You can slot Mnd/Piety on the non company pants (it's the cheapest atm)
Feet - Raptorskin Workboots of the Mind / Linen Gaiters / Dodoskin Espadrilles +1 (5 percept)
Earring - Electrum earring +1 (6 percept)
Neck - Raptor Choker +1
Wrist - HQ mnd/vit wrist
Ring - HQ mnd/vit ring with your company ring