I think I like the idea of all the combination suits being AT 10, but with DB bonus's for the antilaser and antigrav. I am going back over the armor sections of EG, but I think RMU covers everything up through Nominal Technologies 2 (Pre-Industrial era), without having to add anything.
For materials I was thinking of the Castles & Ruins Book for comparisons and came up with:
Castles & Ruins BookW/D = Wattle and daub construction (AT 5)
Wood/Thatch = Wooden structure/thatch roof (AT 9)
Wood/Wood = Wooden structure/wood roof (AT 9)
(For soft woods, use AT
Brick/Wood = Brick structure/wooden roof (AT 13)
Brick/Shingled = Brick structure/ceramic shingle roof (AT 13)
Stone/Wood = Stone structure/Wooden roof (AT 14)
Stone/Shingled = Stone structure/stone roof (AT 14)
RMU conversions (divide by 2 and think about rounding)W/D = Wattle and daub construction (AT 3)
Wood/Thatch = Wooden structure/thatch roof (AT 5)
Wood/Wood = Wooden structure/wood roof (AT 5)
(For soft woods, use AT 4)
Brick/Wood = Brick structure/wooden roof (AT 6)
Brick/Shingled = Brick structure/ceramic shingle roof (AT 6)
Stone/Wood = Stone structure/Wooden roof (AT 7)
Stone/Shingled = Stone structure/stone roof (AT 7)
This is helping me in my other quest regarding chariots, carts, and wagons. I think chariots and carts might be AT 4 soft wood, while wagons would be AT 5 ( because they have to carry cargo and need to be sturdy).