Game Mechanics: Invis exploit?

[DoucLangur]

I am seeing a lot of cases where mobs get pulled with Circlet of Shadow thus that a SK/necro single pulls a mob by dotting it, FDing, getting up and instant invising. Then the mob comes with the next tic of the dot and his buddies not seeing the caster, will not assist.

I do not remember social aggro to work that way on EQlive. Circlet of Shadows was never that useful IIRC. It was helpful to pull a mob through a zone of KoS in that you could avoid aggro from the front (where you were running), but mobs would still join in the chase behind you, assisting their buddy that was aggroed on you. I remember training through some zones that way to get to zoneline alive (without being stunned).

I would like to hear some other (honest) recollections of how this worked in true classic, for I think the way it is currently used, I see it as an exploit.

Regards

Slozem