Inferno tactics.

In general, there can't be any specific tactic. It's a castle that is very dependent on the conditions.

I can't stay silent, I just can't. Regarding the ifrits - it's just a simple way to play as Inferno, it wasn't about any specific map... if it were, then... - it's just a suggestion. But regarding the tactic that ONLY Inferno can use - it's demons. Should I explain what I mean?

[/U]One more advantage hasn't been mentioned yet, a portal and an explosion are often given in the Academy.

Much more often, they give fire magic - summoning fire elementals, sacrifice...
I can't confidently say about the 4th level, there are many more magic options, you can see them in the editor...