Couldn't even test this, as it spat out 7 errors and a few warnings when loading.
Looking over the code it is very poorly written.
stuff like this (which is basic Skript btw):
""
Line 257: (EssentialsSK.sk)
Can't understand this condition: 'player does not have permission essentials.spambypass'
Line: if player does not have permission essentials.spambypass:
""
I genuinely do not understand how someone can write something this big, and not even be bothered to test it on a server before putting this out to the public.
And before you clap back saying "I tested it", it's very evident you did not, because if you did, you would see the same basic errors I am seeing.
There's a lot of BAD code in here. Simple things like forgetting to add a permission to your set spawn command, therefor allowing any player to set the spawn, or how about opening a player's inventory to another player in the invSEE command. (ps opening a another player's inv to the player, will allow said player to MODIFY the other players inv)
I could go on for a while about how bad this is, but frankly I can't be bothered to waste any more time on something like this. Its just awful.