Which alternate upgrade for Inferno do you like the most?

Here, it depends on the hero's characteristics. If you level up according to the scheme I suggested, the balance of power will shift towards using Cavern Lords rather than Ogres. Depending on the leveling, the ratio of characteristics of army upgrades changes. I was surprised many times when, in some cases, modifications that should have lower attack and defense values compared to another option turned out to be stronger in all parameters. Besides, Lords are more effective. Offense is better when playing duels and against heroes; it's not worth spending resources on neutral creatures and troops. Just attack from a distance or finish them off.