Batting
In the longer versions of the game it depends on the pitch. If it favours the bowlers I will play watchfully (1 bar of Aggression), until I have got at least 5-6 bars of Confidence, then I will go to 2 or 3 bars of Aggression. I will go back to being watchful if a break is approaching or the new bar is taken, or if wickets begin to fall.
If the pitch is good for batting I will start on 2 bars of Aggression until I have 5 bars of Confidence. Then I will increase Aggression by 1 bar, then by another 1 bar when my Confidence is full. Again, as a break approaches, I will drop Aggression back by 1 bar.
After breaks I will play on a lower Aggression until the Confidence builds up again.
Bowling
With line and length I will ALWAYS bowl on a good length (middle one) regardless of the batsmans preference. I will bowl opposite the batsmans line preference. So, if he likes the ball on off stump I will bowl middle or leg.
If a batsman begins to build a score, I will experiment with length and around the wicket.
I generally set the bowlers agression to normal (3 bars) if they are a genuine bowler, or in exceptional circumstances I will lower it if they are getting pounded or raise it if they are bowling well. If they are a part-timer I will make them bowl defensively regardless.
I always go with the stock standard fields unless a batsman is hammering a particular bowler then I will move fieldsman around, but that is unusual.
And NEVER NEVER NEVER let a team chase under 160 runs per session in the 4th innings or you WILL lose.