As far as i remember scholar miasma II is melee range
And for the AST being in melee range help in case of RR spread card because he throw it on himself while dpsing and everyone is buff tank include

Auto-attack seems pathetic for you but i can tell you that every little dps increase is good to take
Either casual content or raid content

Beside

You don't inform a dps to stand with the group
It should be a natural thing for him
If he don't... Letting him eat the ground is a good way to teach him