Which alternate upgrade for Inferno do you like the most?

In large armies, the chance that your succubas will be targeted is very low, as the enemy considers them a priority target! (and eliminates them as quickly as possible; I've also noticed that paladins dispel this effect, so it's up to you). However, demonesses are not that dangerous if you think about it, and the enemy will choose more dangerous targets: hounds, nightmares, elder demons, imps!