Which level 3 monster do you like the most (from Heroes of Might and Magic V)?

The AI, on Hero difficulty, prioritizes protecting archers – I can say this for sure... Secondly, archers are usually placed in a corner (there's a 50% chance you won't guess which corner they're in – there are only 2 corners). Thirdly, there's a tactic that works in about 75% of cases against Inferno (to protect against nightmares and Cerberuses in campaigns with greater demons). Fourthly, their damage isn't high enough to inflict so much damage (if the forces are roughly equal) that it would justify their subsequent death on the first turn from archers. Therefore, it's better to either open a gate or move forward 2 squares first, and then maybe the nightmares will scatter the archer defenders (Cerberuses and horses are usually on different flanks for this purpose, so that at least one of them can guess), or the hero will take out a bunch of defending archer units... etc.