I have to assume that a large part of Ladd's ineffectiveness is due to the significant wear and tear on his body. The guy has had multiple upper body injuries, especially to his shoulders, hernia surgery and a host of other maladies. At this point I assume he is held together by duct tape and twine.
I remember a couple years ago, when he was available for trade at the deadline, I was worried about giving up much of value for him because he was so shot physically. Shoulder and back injuries don't tend to improve with age and while working in a violent profession.
Honestly, the best case scenario might be that he plays on the third or (ideally) fourth line with plenty of rest, at least until he can be bought out (maybe there will be an amnesty buyout if there is another lockout), traded or try to get Seattle to take him down the line with the right enticements in expansion.
For now let him play on the fourth line with Cizikas and Clutter and rotate him with Johnston off the bench depending on the team and health. Maybe some frequent rest helps keep him fresh and semi productive. The contract is brutal but maybe he can chip in a bit and help mentor the younger players. That is all I got when it comes to Ladd, sorry, lol.