^Your opponent could just swap out, and thanks to the sleep clause, Gengar would be useless for the rest of the match.

Though this reminds me of Hex/Venoshock on a team with toxic spikes. Those moves could go under other options...

And I think Disable should be slashed for Will-o-Wisp when the sub/disable set is listed. And now that I think about it, Sub/Will-o-Wisp will really pair up well with the Latis, since it helps to cripple Scizor and T-tar...
What she ment was, if you looked at the set, the item was a choice scarf, meaning then you would be locked into mean look, so would have to switch, and would then be a waste of time, as the mean look wouldn't stay.
Oh...sorry about that, then. Items are the last thing my eye goes to.