Suggestions for pets passive abilities

[Lethoiun]

So, I remember asking for pets to have more damage so they actually contribute in higher maps. Which they did do with the heroic pets, so that was cool. I like the damage boost but I think their passives should have additional benefits and stuff.

So my suggestion is a gear slot for pets, like a relic for example. not with stats tho but like extensions on passive abilities.
Examples:
every five sec heal the hero
25% chance on attack to idk launch a fireball
just to give you an idea of what we could have

any thoughts or suggestions?