I am training mine up to an adult. He's a teen now. It cost the same amount of pips as the regular satyr but has a higher heal. He's 990 instead of 860. Mine also gives me an extra pip now.
No, No, NO ! the Satyr pet does NOT cast the spell Satyr heal. it comes with the card at baby. YOU have to cast it. None of the 48 class pets "casts" spells on their own. unless you get something like Lifeblade while leveling the Satyr. i could be wrong but i don't think any of the 48 class pets get Spritely. you'd have to mix with a Sea Dragon or something in order to get that.