Hi,
First of all, I know that since U7 there are some threads about it, but I have some data to confirm my point.
Some days ago when I was farming epic scrolls on OOB I noticed (again) that my Wall of Fire was not "criticing" as expected. I thought it would be because I was running all the time and could not see many numbers, so I decided to test it with no running. I did it, appeared normal, about one critical on six hits. But it was not enough to me, then I started to collect some data.
My character:
Wizard level 20, I had the enhancement Wizard Lineage of elements III (9%) and a Major Fire lore item (9%)
The method:
I did two measures, called Moving and Standing.
Moving - In the first room of OOB, putting two Wall of fire (not overplaced) and running in circles.
Standing - In the same room, I pulled the scorpions and jumped in a safe place. I a Threw a Wall of fire and watched.
When finished, I counted the regular hits and criticals hits from my combat log. I ignored the "(Combat): Spell Crit! Your Wall of Fire has greater effect!" with no result, counted only the numbers.
Numbers:
Moving
2036 hits - 89 criticals: 4,3%
Standing
2062 hits - 349 criticals: 16,9%
My conclusion:
The first tick of Wall of fire is not working properly. When a monster is moving, it constantly go out and back on AoE, reseting it status.
Of course, it can be another thing, but I think it is already a good point to the Devs check if it is really working correctly.
Miscellaneous:
488 scorpions killed
4 epic scrolls dropped, no one worthy of mention.