Inferno tactics.

Of course there is. Just like for every town.
Devils are built when the situation is favorable ("chocolate"). And I think efreet in Castle look much better than devils in Fortress. I'm for buying on day 121, not for building and buying who knows when.

I read your game report from Best of HeroesWorld. You didn't even build devils on JEBUS CROSS, let alone Small...

I had a case where I took a Dragon Utopia with one devil — without support or single units :)

The debate could be long — efreet or devils — it all depends on the situation. And the fact that there's no money on day 121 is not certain; there are Naga Banks, Windmills, and many other things ;) — There were times when even 20k was earned in one day of the first week.

As for Jebus Cross — all sorts of situations happen too. If there's an external dwelling for efreet at the respawn and Master Gremlins aren't built from the start — what to build? It's obvious that efreet could be the main striking stack here. It's the same case as with the description of taking a Dragon Utopia with demons — if there are 2 external dwellings and two towns where demons are easily built, then it's a no-brainer that you could also invest in demonology? ;)