Hmm... I see Divine Power/Divine Favor listed there, but Might & Shield are not. Searching the old forums, though, turns up a few whispers of this effect on those powers.
That and my belief that I made a CoT with that combo - and it worked - are enough to make me want to hang my hat on that memory and toss those feats in a build.
I'll be happy to update the wiki if I can prove it.
Yes, it’s wrath that gets duration doubled by extend spell. CoT got double effect DM/DS at one time, but that was pared back long ago, and it wasn’t duration. Pure paladin and L20 BG get double duration, though.