Not really. I never even used chaffs. Sometimes it can help to fire another rocket at one of them before the targetting reticules reappear on them. As long as they reappear in the time between the rocket being fired and it hitting its target, it still counts as a hit. Also, attacking several at once instead of one at a time can mean that you have fewer attacks hitting you, since they're busy recoiling and such.
One of the Dedicated 500 - #215, #347 -- 10th person to sign up --