Skitters
Prince
I'm in the not sure Chaos mana fits the Clan very well camp too mainly because Bhall's fall was only a relatively recent event, and that ussenly switching up the mana from a sphere that they had opposed for much of their history doesn't quite fit right. Also....an't remember if anything has been done with the Muris Goblins event...but suddenly the clan would be susceptible to it (could perhaps add a clan only press gang them into service option!)
As for Warrens....personally - from a lore perspective - I think growing in a warren should actually make the unit tougher. It may be just me, but I'd have thought the kids from shabby council estates where they breed like rabbits turn out to be a little tougher than those from posh cities where they don't live in high rise shanty blocks... So perhaps the reverse approach could be considered - make Warrens more expensive, and add a bonus to units built....
As for Warrens....personally - from a lore perspective - I think growing in a warren should actually make the unit tougher. It may be just me, but I'd have thought the kids from shabby council estates where they breed like rabbits turn out to be a little tougher than those from posh cities where they don't live in high rise shanty blocks... So perhaps the reverse approach could be considered - make Warrens more expensive, and add a bonus to units built....