Pet active skills are too inconsistent to matter, especially if you already have a different pet at lvl50+ for maxed passives. Just isn't worth the cost.
If you got the cash for that, just tier your wep or armor higher instead and get real stat boosts instead of a random chance your pet will buff/debuff.
Ok, thats understandable. But what if i dont already have a lvl 50 pet? Or i have new rogues gearing up in guild. They dont have levled pets yet. Once they finish gear, should I have them work on a holy pet still? or Sacrafice that 700 dex for an albeit inconsistent chance at 10% pdef reduction.