Arcane Parses exploit

Currently a number of mages have been using Firelands 4p.
It can be detected by seeing incorrect mana costs/spending.

I can’t really detect mana costs of abilities in logs, so if that’s all the Firelands 4pc does, then I don’t have a way to detect this.

Is there not a resource tracker that tracks mana values ?

This one isn’t getting fixed in WoD apparently. It has been fixed in Legion.