To quote Kastellyn's post, which was quoting my own post:

"I would put forth that you need to find an alternative method of dealing with good-aligned cabal enemies that doesn't involving killing them. That's why you're good, not neutral. Then in cabal raid situations and the like when you're forced in to fighting them, is the time to roleplay all that remorse."

The two situations you described are exactly why I'm against a hard-coded solution to goodie vs goodie violence. Sometimes, you may have to fight. But a Rager also knows that every time a mage takes a breath, he's not imminently destroying the world.

Because he's good, he needs to have some other method beyond just wantonly slaughtering every goodie he comes across. Maybe he sees non-good mages as willing acomplices to the magic-conspiracy, so they die on sight. Goodies he believes are being duped or decieved, or are acting through ignorance, or maybe they're charmed. Take your pick. One way or another, he needs to be approaching these goodie mages, in his actions, differently then a non-goodie Rager would. Sometimes, there wont even be a clearly right answer. That's why being a well-played goodie Rager should be hard to pull off.