Nice proof, epicol.
But anyway, while I'm agreeing mostly, I am not really on your side when it comes to healing measures. You're forgetting one thing that some people might do (like me) and that's skipping trash.
I'm using Wormhole for that obviously. And despite having 1k AR and 8.5k armor, you CAN get into trouble when you're in the middle of a gazillion ranged nukers (Fields of Slaughter for instance). You CAN handle this with "skill" as you would say - and you are right. But it's just consuming time. You want to be tough (I switch to shield for "traveling") and only cast stuff on trash mobs for resetting teleport (and thereby healing yourself if necessary).
So it is possible with little to no healing means, but it complicates things and hurts there, where it's most painful: your efficiency.
Sadly, at the end of the day I believe WW barbs win in terms of efficiency still - and that is all that matters.
I have no problems skipping trash. I even for the most part do it in the video... again: diamond skin spam should save you from all damage.
I've watched several videos of WW barbs. I still feel CM Wizards are much more efficient built properly. See: http://us.battle.net/d3/en/forum/topic/6079780878 This video is with pretty crappy gear; I've improved it and have been working on videos at the moment. I consistently complete A3 farming runs in 20 minutes or less using this. WW Barb is a close second, but I outdps and outspeed them.
TBH though, I can't say with a certainty which build is better: WW barb or WW wizard. I've yet to PLAY WW barb, only seen videos. And from what I've seen, WW wizard wins.
Problem is "should" save you ;) Yes, most of the time it is enough to have DS, but sometimes it isn't. It may be a preference thing though. I'm not really on the "you need x LoH to even be able to do it" bandwagon, but I wouldn't want to miss my 800ish tbh. Maybe with more crazy gear and therefore more damage, I'd switch over to LL instead of LoH (which works just fine when things are going your way).
I might be one of those melee wiz going for the wrong stats though. I never thought about upping my crit even further, while I of course see, that more is better always. I'm not rich and I'm losing interest in farming too slow for my liking (and in D3 in general^^), so I'm stuck with my more defensive oriented gear. Can't help it right now.
I will absolutely look into your Storm Armor spec (can't right now) because I used to do that in Act1 always for the giggles. If this is doable with reasonable gear (again, not rich, probably never will be) and affordable changes, I'll gladly give it a shot.
20min for all champs in act3 is ridiculous. I doubt one could even move through all zones in 20mins with no c/d on wormhole. But I have to watch your video first to judge what is to see there.