I will put it to the corner on 2nd serve to my fhd. Slice to opponent's bkd
on ball to my bhd. I found it is more important to keep the ball in play and
deep than trying for an outright winner. Many times when I return the ball
deep my oppo will make an error or give me a soft, short ball to kill.
I have another trick for oppo with unreliable 2nd serve. I will move around
to distract my oppo's attention and get a d fault as a reward. Sometimes I
myself was distracted though.
My 2 cents. For you