Hard serves: redirect with compact motion with either a small amount of slice or top. Very little backswing, but still follow-thru. Follow-thru doesn't wrap around as much as racket speed is slower.
Slower serves: more topspin and more aggressive cut. Full follow-thru with full wrap. Also, may hit underspin or topspin approach shot if serve is short and slow.
Encourage everyone to attack slow serves. This is basically like a short ball in a rally and should be treated as such. Go for it.