Yes it depends on how good the artist is.

Still as I said a hourly rate would still give better ideas and more consistancy, the 1000 for a still and 100 for a fx shot.....

I mainly use Maya and Aftereffects too and go for hourly, I can then balance the two, if its all AE or Maya to AE and comping, I can determine the time scale and go from there.

End of the day its up to you.