Main theme + generic theme yes, sub theme with generic theme, no

[Pocus]

Originally posted by Arryn:
You want to add a theme to a theme. So why not push the point even further, for example, and have Jotunheim with Utgard, Water Cult, Heart of Winter, and Restless Worshippers? The devs have to draw the line somewhere and it looks like they opted for no stacking of themes at all.

the main theme IS a theme. But allows you nonetheless to add a generic theme.

Yes, why not stack generic themes? I dont see a problem with that. For example, if you take the wonderful Stars!, a client/server TBS as dominions, you had to choose a Primary Racial trait, then you could pick what ever please you in lesser racial traits, if you can afford the design point cost.

note : some LRT where not compatible, and would disable one or another.