Economist really wouldn't be of much need, as these things are usually set by the mayor and are simple commands that rarely get used. I think the most important of ranks would be recruiter and builder. The recruiter rank would be very beneficial and keep from having to have mayors and town assistants take off from what they are doing just to place a plot for sale. I know not every town does things as I do, but it is better to be able to place the plots for sale as they are needed instead of having them all for sale at once. In my case, I give every resident a free plot, if I set them all for sale at no cost, someone will come along and start claiming a lot of plots. With recruiter rank I could give multiple residents this rank to help boost the town without giving them build and destroy permissions. As it stands all the other ranks I have listed can be replaced with assistant, although it would be nice to have additional ranks. But I feel that for any growing town that has interest in expansion, recruiter rank is almost a necessity.