There is no such thing as "battle" magic if you are talking about things such as you read in books or see in Hollywood films. Nope, nor wizard's duels either. Real magic is far more subtle than that and works in its own time and pace.
It takes time for real magick to work. You also get what you put into it. If you do a half-bit job, you'll get a half-bit result. If you put all your effort into it and do a full-bit job, you'll get a full-bit result.
As stated above me, magick doesn't happen instantaneously. It is subtle. The only kind of offensive magick would be like curses our hexes. There are however spells for protection, and you can make a shield around you with energy. You could possibly reconfigure, reprogram, or reshape your aura to be spiked or repelling to others.
If you want to practice battle magick as you call it, you should also be very adept at defensive/protective and healing magick.
In addition to the prior posts, you can visualize a ball of mirrors, facing out and spinning in a figure 8 sort of motion ethericaly, around you and movimg with you for deflection.
I am rather new to magick but I know how to manipulate energy ( as in the psi ball) and would it be possible if, through experience, you could manipulate another's energy to block them? It wouldn't be true battle which as said above is not possible, but all I am asking is can you block another's energy or not?
Stephen, it would be possible to block any negative psychic energy your oponent might send your way, that's why we do psychic shields and wards. But magic is not going to stop a physical attack. That's why it is important to understand what the limits of magical work are. You wouldn't want to count on magical counter-attacks where you are being threatened only to find out they had no effect in protecting you.