Necro merc... a Rogue works just fine
My Hardcore Fishymancer is in Normal, now level 29, and instead of using the recommended Act 2 merc for his aura I kept the Rogue from Act 1. She has lousy gear, as do I, but it turns out that she helped tremendously in Act 2 in Maggot and Arcane, where the skellie army always blocks the melee merc. She also did very well in Act 3 in tight spaces like the Spider Cave, Flayer Dungeon, etc.
It could very well be that in Nightmare and beyond the Act 2 aura is valuable, but for now I recommend the ranged merc for necros who summon lots of supporters because she can attack through the horde and stays back out of trouble so she seldom dies.
My Hardcore Fishymancer is in Normal, now level 29, and instead of using the recommended Act 2 merc for his aura I kept the Rogue from Act 1. She has lousy gear, as do I, but it turns out that she helped tremendously in Act 2 in Maggot and Arcane, where the skellie army always blocks the melee merc. She also did very well in Act 3 in tight spaces like the Spider Cave, Flayer Dungeon, etc.
It could very well be that in Nightmare and beyond the Act 2 aura is valuable, but for now I recommend the ranged merc for necros who summon lots of supporters because she can attack through the horde and stays back out of trouble so she seldom dies.