I ran stratholme at lvl 98 for mount and got this trinket which drops often "Ramstein's Lightning Bolts" which drops from the last boss "Ramstein the Gorger" before Rivendare.
I'm not sure why I equipped it but I did and used it on a group of at least 20 mobs from said dungeon and was surprised to see it do massive damage. If I recall right it pretty much 1 shot everything. I then went and tried it in broken isles on mobs there it didn't 1 shot the group but still did a lot of damage. I forgot about it till i went on mount run at lvl 110 months later which was yesterday and got trinket again and tried it. It still did a lot of damage although I think more so at lvl 98. The trinket did 2-300k damage on each of the group of 110 mobs pulled. total damage from 1 use was in 3-4 mil. range. not super powerful but anyway this trinket seems to scale with your level being strongest at 98 for me.
EDIT: Posting screenshots of Skada meter. I went and got the trinket again and tried again. So this is currently what the dmg. was on the mobs in Stratholme. I also tried On 110 mobs in High-mountain The damage wasn't as great but still was hitting 110 mobs for 100k+ damage
TRINKET WOW.png
wow2.png
Ramstein's Lightning Bolts
Item Level 53
Binds when picked up
Unique-Equipped
Trinket
+11 Critical Strike
Use: Harness the power of lightning to strike down all enemies around you for 4729 Nature damage. (3 Min Cooldown)
Requires Level 48
Sell Price: 96
Dropped by: Ramstein the Gorger
Drop Chance: 14.49%