Start off by weighting the boat with the 60/40 combo and then shift the VAB ballast around the boat to adjust the wake. It takes time to get the wake the best it can be, take your time plan a day to just tweak it, shift your VAB, vary the speed with each weight change and you will find the right set up. I also suggest that you video each change, start by having the person with the camera explain the setup in detail and then video the action for at least a minute or two. This way when you return home after a day of making a ton of different changes you can review all the footage and decide what was the best set up to start with the next time you are out. Also do not stop working at it as soon as the wake looks ok, you might be one or two adjustments away for the best wake the boat can produce.
Borrow some sacs and try this, all MLS full except for the side you are not riding on. On the Port fill a 400 lb. sac on the floor right in from of the corner seat against the rail, then stack a second one on top of it all the way to the back of the boat, sitting on the corner seat, next add a 400 lb. to the bow as far forward as possible on the surf side, start out at around 10.5 mph and see what it looks like, vary your speed and move your VAB (Verbally Activated Ballast) around as needed. Do everything the same on the starboard side, including moving the bow sac to the starboard side, for the rear sacs put one 400 lb. under the seat as full as possible then put the other 400 lb. on top of the seat, you might need a 150 lb. brick to get it where you want to be.
Post some pics of the Wake.