I haven't played since 1.02 (?), in which I was mopping the floor with standard mobs in Inferno Act 1, but couldn't kill any special mobs at all (in my memory they all seemed to have molten, arcane, fire-chains and vortex modifiers)
yup, that was the main point of frustration with Inferno.
white mobs were easy to deal with but Elite packs had disgusting affixes.
And then after grinding Act 1 (remember Butcher runs? lol) for about a month, you finally gear up enough to be able to easily kill Act 1 Elite packs.
Then you get to Act 2 and find yourself getting one-shotted by those stupid wasps (and we're not talking about Elite variety, these were just the regular wasps).
