Some questions about new pets, devs answer pls..

Arcanite sapphire passive:
- does it buff allies or only owner of pet?
- is it stacking type damage?
- will it buff owner if pet too far?

Lei Shen:
- has it any aura to regen hp or mana?
- if it has aura for mana regen, will it regen same mana as heroic mishi or less?