Training this pet would/could be one of the hardest I'm afraid.... *sigh*
I released mine yesterday with the following stats:
Was a bit shocked about the 1 mana point and the base damage - very very very low. And it starts with Follower Slot 2. So I begun my training with monsters that do not cast and make only melee damage -. skeletons, zombies and spellbinders in New Haven works good, also the little solen workers. It works like to train a warrior first - beginn with low monsters and make your pet stronger for the harder ones later. The Wolf get only 0.02 point gain and the gains are faster if there's a mob around to fight. To myself I train mine at the Solen Infiltrators with good gains - so I have now this result:
What shall I say... we'll be on our way
Edit: Was wondering why there's still no gain in necromancy?
Actually, regen isn't that expensive, you'll want them all maxed on every pet anyways.
HP for a good tank, stam for proper swing speed and mana so it can use specials/spells.
So that's a must have, along with max resists (4x80, 1x45).