If you have bugs to not see mobs and animals remove clearlag from mods folder and by the server you need the same to make and start the game and you will not be have bugs
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (Dragon's SkayLand's) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Dragon's SkayLand's from the list on the left. The launcher will handle everything else!