Funny you should say that about RoF and Disintegrate with Arcane Torrent Oneoftheorder because I've been talking about doing those spells for days. I plan on casting Arcane Torrent with Red rune to get the 120% damage, and then Disintegrate while the damage is increased using Red rune because its damage is higher than AT, and I will be casting them both often. RoF is higher than disintegrate but costs more mana, and only hits one target...
A bunch of people are going to be using these 3 spells along with Frost Nova, Diamond Skin, and Energy Armor/Storm Armor.
Video of Arcane Torrent: go to 3 minutes 37 seconds.
out of the 6 spells you mentioned, I currently only plan to use 1 of them :). I guess I'm not part of that "bunch".
I think your vid misidentified Arcane Torrent. the animation at 3:37 actually looks like Meteor (Indigo) aka Meteor Shower. here's the definition
I think this is the real Arcane Torrent at 50 seconds. it actually looks like the little spell icon
http://www.youtube.com/watch?v=vwfE5GsYFpg&feature=player_detailpage#t=50s