I have a feeling very few people are going to get Novus weapons for a long while, unless all they do is grind Fates for Alexandrite (esp if you need to meld several grade-4 materia at <10% success rate, which may be what will happen).

High Allagan is still better than Novus (WD>ALL), so if you're close to or have cleared T9...probably shouldn't rush the quest...