c.A and c.B are your good pokes. far stand D kicks high and can stop some jump in attacks, stand A and B are good pokes as well.
There is not a whole lot to say about Brian really he's a strong mid tier character and his new dm is a nice boost to his arsenal.
His As and Bs recover quickly and come out quick so use them to your advantage.
crouch C is ok, but I wouln't recommend using to anti-air as its slow and doesn't reach very high.
jump down C is a great move to use to apply pressure when on the offense, if you can master extra mode Brian you have the same hit infinite as extra kyo when he does dash hop down Cs
Jump b kicks high and its a pretty good air to air but it doesn't have the best priority so watch yourself.
Jump D is alright, can interuppted someone trying to jump if you can get in the air before them, but use it sparingly.
His

.k rising shoulders are ok, you gotta be pretty confident to use them as anti-airs but they do work as a light combo ender if you don't want to have your opponent tossed away by Brian's chain throw after a crossover.
if you can control the pace of the matches and keep your opponent from gaining momentum then you will be fine.