I was thinking that another way to change up raid tournaments besides the color and star restrictions and special rules would be to vary the alignment of heroes or even the number of heroes. Instead of the straight line 5 heroes (tank, flanks and wings) we could have a 4/1 or a 3/2 alignment like we see in some of the stages. I also think that a 6 or 7 hero tourney with different alignments would be fun. Or maybe 7 spots for 5 heroes with 2 gaps that would effect some AoE heroes.
I like the variety of the tournies and was trying to think of a way to make it even more challenging. Hope you all can understand what I was trying to suggest.