Chris (critter), you should really reconsider. I know absolutely nothing about the DLC. I have done no TA (except like the first week on a select few like brimstone plugger) on any of the levels, and I'm still doing this. I will take it with a grain of salt and just have some fun with it, and compete extra hard on the original 16.
I'll probably join if I can be around. I'd suggest doing them all in reverse order to get the DLC out of the way first. Don't want to end on something lame like Edge Volcanic