IMO I prefer rippers, with the blot toad they can dish out an insane amount of re-rollable killing blow attacks, and even without the toad they can still cause a lot of hurt.
Terradons are still good, with the drop rocks etc. But I prefer rippers, just make sure you can keep there frenzy under control...
I go with Ripperdactyls as a unit and a terradon for my skink cheif's mount (flying him solo).
The terradons clearly hit much harder and for only 5 points more but the low Ld + frenzy means that you could find your unit being dragged into places that you don't want them by a savvy opponent. That being said, with some careful positioning you can keep them in the Slann bubble until you are ready to release them on the intended target, 12" goes a lot further on a battlefield than most people give it credit for.
A forum community dedicated to Wargamers, Wargaming 40K enthusiasts. Come join the discussion about Warhammer and Wargaming collections, miniatures, tactics, terrain, reviews, accessories, history, displays, models, styles, scales, reviews, accessories, classifieds, and more!