You made a video with top-end gear and enchantments... it was hardly relevant. At lvl20 I had trouble with 1 Draugr Scourge. Now at lvl38 I'm doing the main quest and have had fights with 5 at once and survived without any real problems even if it does take a good 10-15 seconds to kill one.
Huh? You said you found wraiths very difficult to kill with spells. I showed you a book I found that recommended killing them with a blade. You don't necessarily need a daedric sword of scorching to dispatch them fairly quickly either, any half decent sword will do it. Two or 3 connecting swipes of a sword will probably be faster than some useless spell which is why I've gone more the warrior route than mage. More satisfying and quicker to kill.