That may, or may not work... It would be dependant on whether you have any gear on your equite hammer, and you tech and hero level too. For just starting out, though, I'm leaning toward that not working out well.
For your dummy set up, if you mean 9 hast and sag in each division of your dummies, then yes that is fine(like when we type 9/9/9). Yet, if you actualy mean 9 hundred+, then no, that is a waste of your hast/sag.
And, on your hammer, having 10k ponies in your middle division would also be a waste of troops. The enemy NPC is set up with the most number of troops in their middle divisions, so you take a big hit in the middle divisions if you have a big number of troops there. It is better to put as little as you can in the middle. At least when you are first starting out. It would be better to do 20k equi/ 5 equi / 20k equi, or something like that. Even better though, is the suggested hast/ hast/ equi(front) sag/ sag/ onag(rear) in our other set up post. This offers a minimal loss to your ponies.