I completely agree with the Burns assessment. I got him at +275 and I think he's still good at +240 right now.
AJ looked gassed in his fight against Clementi in the beginning of the 2nd round. I have a friend that has observed Johnson train and he says that Johnson doesn't really have many training partners his size, aside from Cung Le. Apparently AJ has been training on his cardio using hypoxia training.
Burns, in his past fight with Carneiro, demonstrated just the style of fighting that would be needed agianst a guy like Johnson. Burns was able to weather the storm, keep calm, and get himself out of dangerous positions.
Depending on what Johnson's condition will be in the next few days, I might add more to my position on Burns.
At +400 or more, it's hard to resist betting on Irvin too. If anything, Anderson should be at a size disadvantage, only cutting about 10 lbs to get to 205.