You can break through almost anyone's magic armor as an elementalist within the first turn in mid to late Act 1 and still have enough AP to CC them depending on your build. That's pretty much parity with everyone else. Your burst damage also exceeds or is the same as everyone else.
On anything more than the typical low magic armored melee unit? Is this another strictly Lone Wolf plan? Because it sure as hell doesn't happen at level 8 in a four person group even on Classic. You start with a total of 4 AP, 5 if you're an Elf. You aren't going to be CCing anything, let alone breaking the magic armor of most units at that point on your first turn.