Why on earth are people so confused about what the original OP, myself, and a few others are trying to say. Basically, the point we are trying to get across is...
1. Bandit chiefs are overpowered. We had less trouble with Alduin.
2. WE DONT WANT TO CHANGE OUR PLAY STYLE IN ORDER TO KILL THIS FOE.
3. If I am specializing in 2-H weapons...why should I need to use a bow to kill this foe.
1. Alduin is underpowered. Like way underpowered.
2. That's why you're having so many problems. I've give you an example: I was playing through a quest with my spellsword in a cave system and there was basically a chokepoint where an acrher with a high powered bow, and a potent spellcaster basically made it near impossible to enter the room. I tried to fling firebolts at them and take them out, they battered me with both arrows and spells and I died. The second time, I changed tactics, quickly backing in and out, landing a few shots on the mage while getting him to miss me repeatedly. He eventually charged in and then I took him out with my sword. The archer I then baited into moving closer towards me and I used Unrelenting Force to stagger her, and then cut her head off.
3. There is no foe in the game that you NEED a bow to defeat. Even though I'm not a big fan of shouts, the use of them (Fire Breath, Ice Breath) and the proper use of cover and some patience will eventually lead to enemies like dragons landing in order to take advantage of your speciality. For high powered mages or archers, using Whirlwind Sprint to close the distance is highly effective, and so called "archer" swarms a good tactic I found is to keep moving and eventually some space will open up between your enemies, and you can take them out one-by-one. Also, having a companion to help is useful, and making sure you have a good stock of potions is always a good idea.
I'll agree that some builds are a bit tougher then others in game, but there's really not a damage type you can't use by itself with some creativity. I think people are just accostumed to charging straight through enemies and ripping them to pieces, but some builds just require a greater use of tactics and ingenuity.