frequent water changes and salting to keep healthy and speed up healing. definitely move the decor often,Im not a fan of overstocking (even tho I could add a few more to my tank) but One small trick that helped me in the past was to add plastic plants that are made for lizard tanks, they have suction cups so I put them near the top scattered around, I feel it breaks the "line of sight" giving the victim a break every now and then and adding to the hiding places. I find this helps alot in my tanks, plus I move the rocks around every 3-4 weeks also.
heres a video of my 125 gal african tank, theres a few shots in there where you can see the plants. I only have about 65lbs of rock but plan to add more for even more hiding places.