I'd stick with the whip, since you probably already have a high skill level with it (which means an extra 50% damage or so), and since the Neerc comes at +6 (I think), the whip is probably already much stronger than it. If you have leftover scrolls you could enchant the Neerc up, but you'll still be losing out on that weapon accustomization bonus, since the citizens of Attnam probably won't be enough to train it up to a level comparable to the whips (assuming you've been using the whip for a while, of course).