This may sound outrageous.. (especially since I prefer gothic over fieldstone)... but...

How about dropping #50, adding the ruined fieldstone #? and fieldstone accessories #71?
Fieldstone uses less moulds for basic stuff than gothic (perhaps gothic is just more fancy???), and you'll love the ruined fieldstone mould.
The fieldstone accessories gives you a door, fancy rounded stair or platform pieces and other stuff that are basic but allow you to spruce up your builds tremendously.

Gothic, flagstone or cracked floortiles.. they all work well with gothic aswell as fieldstone, any one of them will look good, so don't feel compelled to go with flagstone 'just because it is fieldstone'.