Ive only had luck with the "strafe everyone" method, but the "follow zig zag" method may be a bit safer. I've had issues where after 2 runs back and forth, my toons aren't quite lined up, and have been hit by the waves, and have died. I might try the follow method next time I'm boxing naxx.

Thaddius, I just slowfall/levitate to make jumping down easier (make a macro /targetraid cast levitate, it will toggle through each toon in the raid other than the toon casting it, manually cast the spell on the toon doing it, or if you have multiple toons capable of doing it, they should eventually cast it on each other.)

Then, I'd pick your highest DPS toon, and do the gimmick, stacking the buffs for both that toon, and the rest of the raid. Unless of course you are playing with only boxers. Even if the DPS is slow and he enrages, it's not necessarily a wipe until everyone is dead, he will one by one kill each member of the raid, giving you a few more seconds of button mashing goodness. (or have a holy pally bubble/taunt to buy some more time, or any other sort of emergency backup tank)