This list looks pretty good, its definitely on the right track atleast and shouldn't have too much problems. You've got a pretty good selection of some of circles best models, so really you should happily take this with no worries.
As far as like, really nitty gritty critiques? Well, I'd personally drop the Wolfriders, not because they arnt good (CoS makes them awesome with Mohsar) but becaue there are just a few tweaks I would make to the list with the points saved. In short, I'd turn the gnarlhorn into a feral, throw in a second unit of shifting stones, swamp gobbers, and a blackclad wayfarer. Again, its not that you NEED any of these things in your list, but they would tune the army out for my style of play, so take that into account when building your list.
Hope that helps ya, Mohsar is one of the more difficult circle warlocks to learn so be prepared to get your *** beat a few times
-DF