Mammoth is the most clean and fast for Kodi 18 Build Leia from Lost Builds Wizard. This build uses Aeon Nox skin and it has size of 137 MB.
This build has sections for Movies, Tv shows, Favorites, kids, Sports, LiveTV, Music,Apps and More.
How to Install Mammoth Kodi 18 Build Leia
Step 1) From main menu go to the Gear icon (top-left corner) or Settings
Step 2) go to File Manager
Step 3) go to Add Source
Step 4) go to None
Step 5) Enter this address: http://www.lostkodi.appboxes.co/
Step 6) Name it lost
Step 7) Make sure all the fields are filled and click OK
Step 8) Get back to main menu and go to add-ons
Step 9) go to the Box icon from the top left
Step 10) go to Install from zip file
Step 11) We’ll get a new window, here go to: lost
Step 12) go to plugin.program.lostbuild.wizard.zip
Step 13) Wait for the notification in the top-right corner to popup, Lost Build Wizard Installed
Step 14) go to Continue
Step 15) go to Build Menu
Step 16) go to Mammoth
Step 17) go to Fresh Install or Standard Install (Fresh Install is usually bests)
Step 18) go to Continue
Step 19) It will download and install
Step 20) go to force close
Step 21) After it installs restart Kodi and it should come up. Be sure to give it time to build menus and update add-ons.
How to change the Skin back to Default Estuary
If this Build does not work for you here is how to change the Skin back to default Estuary and remove it.
Step 1) From main menu go to the Gear icon (top-left corner) or Setting
Step 2) go to Interface Settings
Step 3) go to Skin
Step 4) go to Estuary
Step 5) go to Yes
Read Here for How To Remove a Build From Kodi Using the Fresh Start Plugin.