Which strategy to use?
It depends on what your four practice shots told you:
(a) If you were able to read the court properly, and it looks like you can hide, then put up a block so that your opponents mind set has to be to hit and clear. This can be hard to do early in a match.
(b) There are (many) times that your practice shots go no where close to where you want them, or the speed of the court is way off, now you should go on a number. Possibly trying different shooting positions into the number.