Great painting advice that I can only echo. For my 2mm mega-projecy, I used a universal 1-inch bases and plugged in strips to fit. That gives me some added flexibility. At times it can feel more like a 28-mil scale game, just with hordes instead of individuals on each base. Wish I'da thought about varying the base colors for better contrast. That's gold right there.
Got an army shot of my French hordes below.