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, Live Tv, Music,Apps and More.
How to Install Mammoth Kodi 18 Build Leia
Step 1) From home screen go to the Gear icon (top-left corner) or Settings
Step 2) Click File Manager
Step 3) Click Add Source
Step 4) Click None
Step 5) Enter the following URL: http://www.lostkodi.appboxes.co/
Step 6) Name it lost
Step 7) Make sure all the boxes are filled and press OK
Step 8) Go back to Home screen and click add-ons
Step 9) Click the Box icon from the top left
Step 10) Click Install from zip file
Step 11) We’ll get a new window, here click: lost
Step 12) Click plugin.program.lostbuild.wizard.zip
Step 13) Wait for the notification in the top-right corner to popup, Lost Build Wizard Installed
Step 14) Click Continue
Step 15) Click Build Menu
Step 16) Click Mammoth
Step 17) Click Fresh Install or Standard Install (Fresh Install is usually bests)
Step 18) Click Continue
Step 19) It will download and install
Step 20) Click 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 home screen go to the Gear icon (top-left corner) or Setting
Step 2) Click Interface Settings
Step 3) Click Skin
Step 4) Click Estuary
Step 5) Click Yes
Read Here for How To Remove a Build From Kodi Using the Fresh Start Plugin.