Trim the fat?

I use Aeon Nox Silvo but I’m sure it applies to any kodi build or skin. My personal build that I built myself got kind of heavy and bloated over time 1.2 Mb until I started cutting back by deleting add-ons I don’t use and cleared my cache now I sit at around 720 mb. What are some other ways to decrease the size of my build without losing functionality and my current skin? Also is there a way to delete the default confluence skin that sits unused or would that even make a difference?