Originally Posted by
rhinomatic
You're going to have to help me out here. I can't really think of any DEs where someone with a mount would outperform someone without one.
All DEs I saw were either fixed in a location that wasn't overly large, so by taking time to mount up you might actually lose out on some of the activity, or they involved escorting/following NPCs that moved slower than normal run speed, so if you were mounted you'd end up ahead of the ambush and would have to run back to participate.
I may be missing something though.