Generic Advice

Overall Strategy
Mindful practice. A lot of it.

Generally speaking, the accepted best strategy is to work on increasing accuracy over everything else (even if it means going painfully slowly) until you're consistently pulling 90% or so. Then transition to speed, going faster and faster until your accuracy drops to 70% or so. Rinse and repeat, season as desired.

AI Options
The AI options can be found under the 'sandbox' menu option. Generally speaking they will push you to improve both accuracy and precision at an ideal rate. You won't feel like you're improving because the challenge will be increasing difficulty exactly with your skill.

The AI isn't yet optimized perfectly for speed. This means you won't be able to just "sit back and let it help you get better".

Tracking
Motionshot is an excellent starting place for improving tracking skills. Custom versions of freetrack, blinkshot, or ninjashot can help bridge the gap between "feeling good" in motion shot and attempting the standard freetrack and friends. They are incredibly challenging even for intermediately skilled players.