um step two after destroying the rocks is using the resulting rocks/stones to build bridges to the small islands near your island.
- between s4 and s5 are thrree islands in the lake
- 2 islands off the west coast of S7
- island to the south of s1
- island to the east of s9
- might some of those miscellaneous rocks in the water become a building spot also?
Other option then also is something else to build on water like
Fish farm