Where are the grotlings supposed to be located? There's thus far been zero canonized ogre-grotling contact, though presumably some extent happens and it just has yet to be shown IC. As per my understanding Vestec left them isolated in the Venomweald, specifically the western part near the Golden Barrens and Rukbany rather than the eastern part of the Venomweald that's controlled by Omokog.

But it's suggested otherwise by the fact that Tauga is running around in there as well as this line,

[quote]Tauganactsa develop a way to use the Metatic monsoon winds to power furnaces hot enough to create Galbar's first crucible steel. This finally gives the islands a truly competitive alternative to bronze.[/quote]

Hard to get Metatic monsoon winds if you're on the other side of the Ironheart range and then there's probably another thousand miles beyond that just for good measure.