The hay you are feeding her is good. I will see if I can find the links I have that tells the calcium content of greens and hay. I think she will be fine, but I am not an expert. But Chase has made it through 2 bladder stone removals and 1 bladder sludge. I would make sure she is checked on a regular basis to make sure the sludge stays gone. That is one of the problems when you don't know the cause you can't really tell if what you are doing is helping without taking them back in to the vet for them to do an x-ray to check the progress.
I would ask the vet when you pick her up if you should syringe water. I would soak the greans and try to offer her more options to drink out off and do what tonyshuman said about maybe adding some flavor to the water. When I added flavor I always added another regular water thing, so if I put flavor in her water bowl I added a bowl of regular water and left regular water in her bottles. That way she still has plenty of options to drink the regular water if she does not prefer the flavoring. Chase never took to the flavoring. Currently in Chase's cage she has 3 water bowls, 3 water bottles, and a cat water foutain. I make sure every step she takes there is an option to drink.
I cut out parsley also except for maybe once a month I will give it. I use cilantro in place and my buns love it. I would also introduce the new greens slowly so you can tell if one is messing with her system.
Activity will get the urine moving around in the bladder which will also get the sludge moving, so the more she moves hopefully more sludge will be passed when she urinate. Sludge tends to sit at the bottom of the bladder and so it doesn't always come out as much when they urinate. I know there is a way you can massage the bladder to keep the sludge moving around and that is suppose to get more sludge out when they urinate, but I never really did that. You would want to check with your vet on that and they would need to show you how.
Another thing to think about is any treats she is getting. Those could contain a lot of calcium.
If you have stairs let her run up and down the stairs. That will make her more active and will really get the sludge moving around.
This website lists the types of hay. When you click on the type of hay it will give you the calcium content.
http://www.barbibrownsbunnies.com/hay.htm#Bunny%20Blend
This one also lists calcium content of hay.
http://www.carrotcafe.com/f/caforage.html
Calcium content of veggies
http://www.carrotcafe.com/f/calevel.html
This is from the HRS and discuss lots of different ways to lower calcium and what foods may help
http://www.rabbit.org/journal/3-5/calcium.html
This is a list from the HRS about bunny safe greens. You want to make sure the low calcium greens you decide to try are safe
http://www.rabbit.org/care/veggies.html
Here is the thread in the library. There is some great information there in the links. I know that in the thread for Chase and Luna there are a lot of suggestions so I would take the time to read them.
ETA it would help if I put the link to the library thread lol
http://www.rabbitsonline.net/view_topic.php?id=12052&forum_id=10