Exact wording: All mundane weapons USED by the bearer are coated with this venom. By this wording, IF the chief CAN fire the Howdah weapons,...
The majority of your list is really fast and I think that your saurus might get left behind. I would reccommend dropping a unit of saurus warriors...
As was already mentioned, you will probably run into problems when it comes to the magic phase. Having an oldblood as the lord and no EotG makes...