Hi Sixgun, I have the H23, not the H25, and am not an expert, but I think the answer to your question is: it depends. If the winds are light to moderate, your sail is naturally flat, and you are a strong guy, then you may not need to winch the halyards. The same would apply to the jib sheet, especially if you are not pointing too high into the wind. Others may want to correct me here.
Leading any lines aft just makes life a little easier. I use the topping lift (led aft) quite a bit if the winds are very light when racing (note: racing is when two boats with males aboard are heading in the same direction). I can get a nice twist in the main, and keep those upper leech tell tales streaming.
-Chris