Too late, he's already getting the 360 version.

I had about 300HP fighting Alduin the first time, but didn't really have a massive problem. Spellbreaker takes care of a lot of that. I also had some amulet that gave +30 to Health, Stamina and Magica. Dragonrend, as mentioned, stopped his flame attacks. Finally, my sword has two enchantments - one being Fiery Soul Trap (best thing ever) and the other being Absorb HP, so fighting him would regenerate my health.