Who's stupid idea was this? It's doable. The best monster group to test against is the 3 Red Dragons in FF4ET.
They have a special attack sequence on their second turn, by leading off with their Heat Ray attack, followed by a physical hit.
During this sequence, you can skip taking the second hit altogether if you are fortunate.
Although, once in a while, you can see the monster's Heat Ray attack hit nothing
right after you successfully run away.
Here's a pic of it in action:

Note: This seems to occur if you drop money...