There is a way to filter out your chat to see what your target monster is doing. It takes some tweaking to get right. When you DO get them right, you'll be able to see just the mob and yourself in chat when it comes to actions/combat related messages. All while still seeing say/party/ls/etc chats. Also, don't forget to use chat holds. Makes looking for party and ls messages a lot easier.

I am not currently at the game right now, otherwise I would give you my filters for such things like stunning. All this comes from years of having to stun old 75 HNMs like Khim and Cerb when Gates of Hates was beast and Fulmination was devastating.