There is the issue that we do not know how long it takes Disintegrate to "ramp up" when crimson-runed; if it is a nontrivial portion of that 6 sec debuff duration, the Torrent-woven Disintegrate strategy may not work out to better dps than a sustained Torrent (unless someone already knows what that ramp time is.)
While the possibility exists for a 1:5 torrent:disintegrate weave cycle on the basis of dropping the buff then swapping, I'm pretty sure it won't make sense to do a build that includes RoF as well as any of the other channeled effects. There is the argument of single target (boss/unique) vs multitarget scenarios, but I think that sacrifices too many spells slots. I suspect every (PvE) wizard will want Familiar (crimson) and Mirror Image (crimson), and probably Slow Time (crimson or alabaster) as these are going to be substantial dps boosts on top of whatever your primary sources of damage are. Similarly, I suspect you will want either (golden) Storm or (indigo) Energy Armor, depending on your spell selection/play style for AP endurance (some builds which include golden Signature spells may circumvent the need for either of these by building for some kind of pump/purge strategy, although they would probably benefit from indigo Energy Armor.)
In general, I think you really only need to be concerned w/ 1) having a spell which will be good for single target (even if it is not optimized purely for that), 2) a spell good for multitarget, and 3) a method of endurance/regen. Beyond that, I would think looking for a combination of damage boosts and utility. If you are playing mostly solo, you may have to lean towards utility.
I haven't seen any video or explanation of the targeting type for Arcane Torrent. Does anyone know how Arc Torrent, Meteor, or Blizzard will compare in AoE range/width, and for a more subjective estimate, how Arc Torrent will compare with Disintegrate for ability to deal with a group of creatures? Given that they cost the same, and that continuous use of Torrent should deal more damage than Disint (Disint: 188-234 crimson and ramped up, Arc Torrent: 107-181 * (100% + 120%) = 235-398 crimson, RayoF: 369-434 crimson), this seems like a prudent comparison. Furthermore, in the case of either short bursts or AP stable/AP building scenarios, you can/may have arcane (alabaster) hydras dealing 120%-increased damage to a target (though this is a separate aspect to consider really.)
On a somewhat separate note, it seems that more people like golden familiar than crimson, but if crimson is simply 40% more damage period, then I have trouble seeing the 4.5 AP/sec as superior in net DPS for even a very extended period.
While the possibility exists for a 1:5 torrent:disintegrate weave cycle on the basis of dropping the buff then swapping, I'm pretty sure it won't make sense to do a build that includes RoF as well as any of the other channeled effects. There is the argument of single target (boss/unique) vs multitarget scenarios, but I think that sacrifices too many spells slots. I suspect every (PvE) wizard will want Familiar (crimson) and Mirror Image (crimson), and probably Slow Time (crimson or alabaster) as these are going to be substantial dps boosts on top of whatever your primary sources of damage are. Similarly, I suspect you will want either (golden) Storm or (indigo) Energy Armor, depending on your spell selection/play style for AP endurance (some builds which include golden Signature spells may circumvent the need for either of these by building for some kind of pump/purge strategy, although they would probably benefit from indigo Energy Armor.)
In general, I think you really only need to be concerned w/ 1) having a spell which will be good for single target (even if it is not optimized purely for that), 2) a spell good for multitarget, and 3) a method of endurance/regen. Beyond that, I would think looking for a combination of damage boosts and utility. If you are playing mostly solo, you may have to lean towards utility.
On a somewhat separate note, it seems that more people like golden familiar than crimson, but if crimson is simply 40% more damage period, then I have trouble seeing the 4.5 AP/sec as superior in net DPS for even a very extended period.
Builds I see making the most sense look roughly like:
Arc Tor w/ arc Hydra: http://us.battle.net/d3/en/calculator/wizard#kRShgO!ZbV!ZaZZbZ
RayoF w/ Meteor: http://us.battle.net/d3/en/calculator/wizard#jPZhgO!bXV!ZZbZbZ
Meteor/Hydra/MMs: http://us.battle.net/d3/en/calculator/wizard#ZRPhQO!fXb!bbZZYZ
These are all from the standpoint of a "pure dps" wiz most likely in a group of characters.