Is this against ToS?

[Kezzik]

if I have a level 60 wanting to help me quest, is this allowed? Basically, if I attacking mobs, and he is coming in and killing mobs for me outside of my group. So I pull, and then he kills. I just would like to know if this is allowed. Thanks.

[Naulii]

As long as the level 60 character isn't your second acc which you're multiboxing, it is probably allowed.

Thats just normal mob tagging which exists since retail vanilla.

[Mimma]

Confirmed - mob tagging is allowed.