Expertise and Incorporeal opponents

[CRGreathouse]

B]Where are the rules about 15 ranks of tumble improving the Fighting Defensively action? [/B]

There aren't any. The ELH is ryumored to have an additional bonus at 25, though...

 

[whatisitgoodfor]

Where are the rules about 15 ranks of tumble improving the Fighting Defensively action?

OA, pp 58 in the section on Extreme Tumbling.

As near as I can tell, its just a short excerpt from the draft of the ELH.