Ever since 2.2 there have been several mobs that are way too strong for their CRs, it seems like someone forgot to look at these mob's stats when neocron 2.2 was being coded. I've been hunting firemobs today so I'll just list some of those, I'm sure there's a few others so please post them here if you know of any mobs that are clearly too strong for their CR.
Hopper 68/68
Mauler 64/64
The Mauler is especially overpowered, it does more damage than every firemob except for Grim Persecutors, and Persecutors are believed to have bugged damage. The Mauler definitely does more damage than Grim Chasers who are around CR 120. Strangely enough the Mauler has very low health and died in about 4 bursts of my SF Plasma Wave. This makes it even more likely that their damage wasn't intended to be this high. Maybe someone accidentally typed an extra 0?
How you fix these is up to you, you can simply tone down their damage or raise their CRs appropriately.
I know PvE has alot more problems than this but these should be the easiest to fix, I think its worth spending 10 minutes going through the code and changing 3-10 numbers now rather than trying to make a big all in one PvE improving patch.