Well sir, you may be a really good skier, but whoever gave you guidance on ski length is WAY off. What is the main determining factor in ski length? WEIGHT, not height like some people suggest. They do that because for the average person, a ski of almost equal height is a pretty decent bet. However, the reason you choose weight, is because that is what determines how much pressure you put on the camber of the skis, and the effective edge length. If you weigh 190 and are on 159 skis, you have so little control. WHat happens is that as a heavy rider, you put a lot of pressure on the middle of the ski, overriding the camber/flex, and creating a situation where your tips and tails are hardly making contact with the snow. I hope you didnt already buy those new. If you did, sell them and get a pair of 179 cm. If you are 190 pounds and a good to excellent skier you should be on a 176 cm to 185 cm park ski and a 180 cm plus all-around or pow ski.
If you are new to park, then Griffons are fine. However, if you start hitting 30 and 40 ft plus jumps, you will want to move up in binding. At 190 pounds and anything over a size 10 foot, you will be getting dins at 10+ to stay locked in. Good luck bro!