I don't have any because this often just spams my screen and doesn't provide any benefit. The more quiet the screen is in raids the better you can concentrate and focus on the boss. Of course big numbers are nice for epeen, but do you need that information for anything else?
The only thing I still have to create are some weak auras to track my trinkets
Some would argue Blizz's default combat text spams the screen more than addons, specially while doing AoE.