Which alternate upgrade for Inferno do you like the most?

I choose:
1. Imps, because they consume mana at the beginning of the turn, and they look cute too :)
2. Horned demons... I don't think I need to explain.
3. ONLY Fire Hounds
4. Here, usually both are chosen at once, instead of horses.
5. I'm leaning towards Hell Horses, but I rarely use them.
6. Lords. Only Imps if it's against Orcs.
7. Archdevils, they are more beautiful and stronger, and summoning a Lord is awesome!

Therefore, I think that upgrades of levels 2-5 are better, but I vote for Succubi... although I would also mention Fire Hounds.