first let me say that this was very hard for me too. i kept changing it around until i felt like i didn't want to anymore, if that makes sense. that's when i knew i was done. here's my 2 cents for what it's worth. it's hard to tell from the picture but it looks like it lacks depth. what i mean is, make the bottom row curve around and then the second row could sit a little further back on the first. then try turning some of the smaller rocks vertically or at a wierd angle so they make little caves. i also agree with the other person who wrote about the peaks and the background. try like two towers at the ends or one in the middle and the background will make a huge difference. one last sugesstion, i actually did this myself, after i rearranged my fiji i decided to get a few pieces of another kind of rock. i got some tonga branches that look really nice against the "boulders". haiti rock is nice too, and the "branchy" pieces aren't as heavy so they aren't that expensive depending on how much you get. i got the idea you were looking for some technical advice, so i hope this helps. good luck!