this army list looks pretty good... here are some thoughts:
Tehenhauin himself looks pretty good, a fair balance of magic and combat. for 350 pts, not bad, although he is compulsory for a Red Host. only being able to choose form the Lore of Beasts
OR Lore of Heavens, limits him in magics a bit. Tehenhauin cannot be equipped with more that what he is given but he still has a Scaly Skin 5+ and a Ward Save 4+. only being able to join units of Jungle Swarms or Lesser Swarms (which do not count toward Core minimum) seems silly to me. but he has Unit Strength three with and additional
D6 attacks because of the Tide of Serpents. this is (sort of) made up for with the Totem of Sotek which allows Swarms he joins Regeneration on a 6+. Tehenhauin also has the Red Crest rule which comes looks like it could come in handy, making him immune to poison and able to move through woods/jungle freely (other Skink characters may take this for just five points). i like the way he looks too with that little dead Skaven on his base
the Engine of the Gods looks pretty good too. it's nice to see a different artillery unit other than Salamanders too. it has M6 and even though it has WS2, its S5 and T6 make up for that a bit. a nice Scaly Skin 4+, Terror,
D6 Impact Hits, Stubborn and Immune to Panic... it's practically a Stegadon, it even has Unit Strength eight for crying out loud! they just strapped a "stone thrower" to it in place of the Howdah. but i'm being mean. with a name like "Engine of the Gods" it has to be good, right?
Skink Skirmishers (and characters) MUST take the Blessed Spawning of Sotek for ten points per unit, not a bad trade at all i suppose. the Red Crests block Skinks look rather feeble though... WS3, S3, T2 and no poisoned attacks! they do have the Red Crests rule to kinda make up for that, despite having Hatred of all Skaven and come standard with the Blessed Spawning of Sotek. they also must for a unit of no less than fifteen. but they may carry a banner up to twenty-five points and the Sign of Sotek (re-roll failed to wound on first charge) i just that much, nice! i guess that's what you get for seven points though...
Saurus must also take the Blessed Spawning of Sotek, but other than that they remain unchanged. most of the other units are unchanged and remain in their usual slots. though Stegadons have been removed for the Engine of the Gods.
well ill shut up now, does anyone else think this is a viable list? it looks like it may be good, really i just like Tehenhauin!