If you haven’t done this already, play Vision Quest again (on normal mode if its your first time doing this) and live with your descisions (no resets if units die I mean) would be my recommandation.
Aside from that I would just recommend you to go to the Fire Emblem Fangame Directory. Click on whatever interests you the most. Many hacks out there are fun despite not hitting one or two of your criteria and I think that finding something you might enjoy by yourself will lead to the most fun.