Find a good child psych who does not resport to meds at a drop of a hat. Sounds that she does not get any behavioral support at school. Do they have behavior modification plan/program? Does she have IEP? Do they beleive that her behavior is the direct result of her condition? Do you live in the US? If your daughter has IEP and her behavior is the direct result of her Aspergers', they cannot expel, but rather to change IEP goals and write some behavior modification goals into it.
Good luck and I agree with the previous poster that so many meds is SCARY
I would check with my pharmacist if I were you. I would also consider taking her off the meds if she still aggressive anyway! Was she aggressive before she started attending school? What is the atmosphere at school? I have an 11 year old Aspie daugther who was never aggressive, but last year when she was placed in a room with a special ed teacher that did not understand Asperger's at all she was was crazy--flipped all the desks over in the room, hit, and left the school in the winter with no shoes or coat on. Then they proceeded to expel her for 3 days for walking out of the school. Anyway, I would seriously take a look at her environment and consider getting her out of it if it is causing her that much frustration. To have a 10 year old on that many meds is pretty scary, to me anyway.