I suggest using Primedice. They've been around a long time and are extremely trusted.
That would also be my suggestion. I also enjoy rollin.io and I personally trust them. Matter of choice though
I think Primedice is not a Casino, but Dice Site.
In my opinion Casino is like Roulette,Slots,Videopoker etc
But I'm not sure what OP want? since he did not specify what kind of casino he want to play.