I'm gonna play survival mode.
but I strongly recommended before you play survival mode you should play normal mode till LV5X~6X.
System need to reach LV40 so you available to play survival mode.
But you can't fully know all the task or raid who is danger who is not.
This is from my experience in the Taiwan version of Aura Kindgom.
P.S.if you want more information,maybe you can join Serenity guild then we can discuss more detail about it.