I just see this thread now, sorry.
First of all, I wouldn't combine mods as it can really affect the server performance and stability in general.
I don't recommend ACE, and TFR, as there is no purpose to use for a not that populated server and therefore the reasonable way to use it, is to have clan operations with possible Zeus included. Same goes with any AI mod, they are really not good as you might think, especially with different scenarios that could possibly be run on the server.
I am really down to have a server that would bring us to a different era, or at least a front, as I'm not the biggest fan of vanilla Arma 3. If you need any info on Iron Front, I can give you pretty much anything about it as I am part of the developing team for it. The thing I will say is that it does have a wast variety of different assets and units.