Depends on the situation. An important thing to note when you're fighting Akira is that most of his attacks do not track. So sidestepping is key. He does have some attacks that track though like 4P, 214P+K and 46P+K. Plus, his P, 46P and 214P are all +1 on block, so you gotta be careful before you make your next move. Also his 2P is +1 on hit and most Akira players will go for 66P/666P/6T/6P+K/GBOD after it.
Free Step Dodge
samuraihachi
Brute
When you or he sidesteps.
DestructionBomb
666P at certain cases can crush highs as well if timed right. 66P doesn't, but around midpoint animation (somewhere before the elbow connects, it can crush timed highs.)
Rikuto
It's always your "turn". The question is whether or not you're going to choose to spend it blocking.