honestly my opinion on orbs is that i do not like it at all. 1. it is because whats the point of invulnerablilty for spawning if u cant even use skills to kill the spawner.
2. the invulnerablilty orb should only be in the spawn room so if u would get revived by mage or rhino u cant even do anything all u can do is run around waiting for the orb to disappear then u can use buffs adn skills