Well u could make it public for a month or so. It's not like it's gonna go crazy. If not that then just invite players that will acually "test" the things not just mess around. I myself wanna test a few things like DBT Mjol. If it works, i might uncard my mjol and switch out my sam card to a tg card.
Thats exactly what a test server is totally not about.
A test server is not to test wich builds suits you best (this was the big mistake made in the Rachel episode test)
You're on a test server to test the incoming new content, not what already exists. That's what official Sakrays tests server exist for. If there was a change in something that is already existing then go ahead, but if you're there to tests builds for your own convenience, then you shouldn't be there.. =/
So is it just for like new players to check out the server or something? Or is it to like check out new maps and bugs, ect.
Off-Topic Again:
It's to check out new Maps and Bugs as well as see if any new items added are any game changers or break the game in some way...
Something a tester would currently test would be a Nydhorgg's Shadow Garb [1]
They'd go on the Test Server and see how the Garment would fair in the 3 aspects of the game PvM,PvP and WoE then help the GMs decide what to do with the garment whether to implement as is or customize to fit our Server...
A TEST SERVER IS NOT FOR YOUR PERSONAL GAIN BUT FOR THE GAIN OF THE WHOLE COMMUNITY.
Even more Off-Topic:
Anyone on the forums could have told you that anything with a Bapho doesn't work with Turtle and is a useless Carding DBS Mjol is the only carding with a Bapho.