Don't use Essentials, it's old and outdated. Used EssentialsX
For large builds or lots of worldedit use FAWE (Fast Asynchronous World Edit) or AWE (Asynchronous World Edit). These plugins allow for multiple changes at rapid pace without lagging the server.
Don't use group manager, use LuckPerms, it's much more user friendly and simple for beginners to understand while also being the best permissions plugin there is.
Don't use Votifier, it's old and compromised. Use NuVotifier. It's free, and more secure for your server as it uses different protocols and additional methods that the tradition Votifier lacks. (Look into it for a better explanation).