OK, I am assuming you are using short circuit mode on steel...
It really comes down to what works for you. There is generally no need to use one weave for the root, another for filler passes, and yet another for the cap.
If your machine is dialed in right, you ought to be able to use a Z-weave for all the passes. The weave just gets wider as you deposit successive passes. The key thing is pausing long enough at each side of the weave to tie the bead into the side of the base metal and/or previous bead. Or if a C or J weave works better for you, use it.
If the machine is set too hot, you may have trouble controlling the molten pool with just a Z-weave. Then you might want to switch to a C or J-weave. The action of moving up the bevel face momentarily gives the molten pool a chance to cool down and start to solidify and maintain a shelf to build on.
It kind of sounds like you may have the cart in front of the horse. You are asking about welding a test plate before you know the basics. Are you trying to certify to get or keep a job? If you are, I understand the pressure to certify. But in the long run, you will be better off if you get a solid foundation before trying to certify.