I would really recommend arms and hubs forward on that type of surface. To help with the jumping, moving the wing forward too. I almost always mount my wing so the back edge of the flat area is tangent to the wing mount pads, if that makes sense. I cut it out around the shocktower/shocks. Here's a picture from an indoor race just a few weeks ago; it's not the clearest but hopefully gets the idea across:
http://photos.smugmug.com/photos/i-R...RsdMKjj-X2.jpg
The 4* block is best for forward bite; I very rarely have a problem with forward traction if I've got the 4* block and arms/hubs forward. If the 4* block kills too much steering though (it shouldn't, see recommendations below for steering tips), you can run the 3* block and dremel the hubs to move them an "extra" 1mm forward. That's a compromise between the 4* wheelbase/CVD angle and the lesser toe-in to keep on-power steering.
I wouldn't be afraid to add some weight to the rear of the car either. Front and rear weight don't have to be either/or, sometimes a slightly heavier car just feels much more settled and is loads easier to drive. I almost always have 14 to 28 grams around/behind the motor (Cut a lead piece in half diagonally, stack the triangles together and they'll fit great in the little triangular braces in the back of the chassis, just between the transmission and motor.)
As to the front end:
Ribbed tires generally have more steering than treads. If you feel the steering is washing out mid-corner with the bobcats up front, I would try some JConcepts groovy's, Losi 7202/7204s, Proline 8175's, etc. Ribs definitely steer more when there's loose stuff on top.
That short front camber link, with no ballstud washers, is going to allow the front end to roll easily but without much authority, which could lead to the steering washing out mid-corner. If the car goes in well but won't hold the turn, I'd recommend going to the inside hole on the front tower, start with one washer. Especially with the long rear link, going to a longer front link will help with the overall balance of the car.