Inferno are very good at attacking, but they are not so good at defending... In my opinion, they are the second best, after the Dark Elves, or maybe even the third best, after the Necromancers, I don't know... Imps are quite strong for a level 1 unit, and if you upgrade their luck, they become even more deadly. Their ability to drain mana from enemies is also good. Demons are probably the most "defensive" warriors in the Inferno faction. But they are slow and not used in the later stages of the game. The "explosion" ability is good to use in a crowd of enemies, but you have to get close to them first! And demons are not very good at that. Hellhounds/Cerberuses - upgrading is a must. Cerberuses are like mini-Hydras with the ability to attack three enemies at once without retaliation. However, they die quickly. Succubi/Demonesses - the only ranged unit in the Inferno faction, and what a unit! They can retaliate against ranged attacks, and demonesses can also attack in a chain (but it doesn't work on other demons). Nightmares - they are fast and have a warrior aura, as well as a fear attack, which makes them formidable fighters. Cave Demons - the most powerful spellcasters in the Inferno faction. They are slow, but very strong in melee combat, and they also cast spells well. Devils - they are not very useful as level 7 warriors (compared to other races), but they can teleport and create Cave Lords from corpses, which makes battles much easier.