Thanks @jda amd @jabberwock for your replies. I am not looking for a fancy nssa aquascape, they do look unnatural. But stacking up bunch of rock kinda feels dangerous. I have no reason to believe that rocks will fall but still can’t get over the anxietyMy macro algae did real good for a long while. Great nutrient exporter. I ended up trimming it too much and losing it, but not really disappointed in removing a maintenance feature. I had to mow the lawn very frequently. I got a protein skimmer instead. Check my tank thread for details.
Stacking the rocks is the best way in my opinion. The elaborate scapes are pretty unnatural.