don't waste em on anything that can be obtained by capturing a level 10 NPC. I know you've spent alot of time and effort on your city, but you're strategy should be to build that one up only big enough to conquer a level 10 npc, then you have all the level 10 stuff that comes with it, you'll have to tear down alot of cottages, but you won't have wasted scripts on level 10 stuff you can steal.