I don't have the book with Tharanduil's elk rules, what's the lowdown? I really like the model, but is it good in game turns? Is it a monstrous cavalry?

Which leads me to tangent, is Radagast on Giant Eagle the only option Good has for monstrous cavalry? Does Gandalf have an option to fly on one?

Thranduil's elk is a horse what has 2 wounds and lets Thranduil be strength five on the charge. It is not monstrous cavalry and yes Radagast on Eagle is the only way to get good monstrous cavalry. You can find the states in the There and Back Again book.

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"Draw your sword with a heavy heart, but swing it with a heavy hand"

Gandalf used to be able to hop on an Eagle back in the day, but it's been a while since that was the case!

Thranduil's Elk is a tricky one: it's a fantastic option as mounts go, and the cavalry charge bonuses (and additional Strength) are great, but depending on what he's fighting, he may be better off on foot with additional attacks from his Bladelord special rule. If fighting against one or two opponents at a time and charging, stag's great, if vastly outnumbered, on foot would be better. It's worth getting the mount and try to hunt down enemy heroes - after that, you may have the Might advantage, enabling heroic moves to either charge or have the opportunity to dismount.

Thanks guys! I haven't even decided what army I want to play yet, but that Thranduil model on its own makes me want to play Thranduil's Halls. Also I think the rangers models are awesome.

Bummer about no Gandalf on Eagle, I mean that is how he escaped from Orthanc after all.

The elk is also D5 which is a nice boost against S2 arrows.