Outbreak vs Terror vs Anomaly

By Einlanzer80, in Arkham Horror

So with these three codex "type" game modes, I have always worked under the assumption that outbreaks made for the easiest games, then terror, then anomaly based scenarios were the hardest, and my experience so far with playing the game supports this. Does this jive with other peoples' experience?

If so, I've been considering how to add a bit more challenge at least to outbreak scenarios, possibly to terror scenarios. The simplest thing I've come up with is to spawn a monster when an outbreak occurs in the outbreak. Another option is to worsen the effect of the reckoning in those scenarios such as regenerating monster health, placing an additional doom at the unstable space, etc.

Has anyone tried this type of fine-tuning?