First suggestion, do you plan on keeping those damsel? There is a very good chance that anything you add later could be killed by those fish. If you do not plan on keeping them, I would remove them now before adding any more rock.
If you are going to add base rock, I would put that on the bottom of the live rock. FYI, for my tank, I started with base rock on the bottom and then after the initial cycle, I added live rock on top. Years later I can not tell where the live VS base rock is.
Remember as you stock inverts, always add less then add as you need to. If you do not plan on keeping those damsels, I would do it in this order:
1>. Remove damsels
2> add base rock under live rock
3>. watch for possible cycle due to die off on base rock
4>. when sure there is no cycle, I would add some hermit crabs, worms and a few snails and let them get established in the tank
5>. add one or two fish