So before i got the corrupted data message once again, I managed to runs some tests with a high spellpower mage build in Awakening. For the record, if anyone has any idea what causes that message to appear, I'd appreciate it in a post or PM. it only seems to happen when i return to Origins from a save in Awakening. Not sure if it's connected to Awakening or something I do in Origins.
Anyway, I tried a number of different mage builds. I'll start first with the Legion of the Dead builds which add +20 to all stats. The first one I had +30% nature damage gloves and all the usual spellpower boost items, 192 magic, 202 Spellpower, 117 mental resistance, 40% nature damage shapeshifted into swarm form. I t was doing in the range of 79-110 nature damage per hit, at least twice what you get in Origins. More magic and max nature damage would likely see those numbers increase.
next was Bear Form equipped with Clamshell Plate Armor, Veshialle and Fade Wall(Legion). Str 92, Dex 90, 207 magic, 202 SP.142 mental resistance, max physical resistance, 740 health, 540 mana, 54 armor, 141 defense. Normal damage of 79-90, with a slam/critical of 180-200. Critical was 25% with all intensifying runes on veshialle.
Spider-same build as above regarding equipment. 69 strength, 101 dex(bear really catches up to spider with dex), 207 magic, 142 physical/mental resistance. 671 health, 544 mana, 44 armor, 152 defense, 61.3 normal damage. 43 nature damage per second for 3 seconds with Poison Spit, 66 damage for normal damage, 130 damage on a crit.
I also ran some tests with Voice of Velvet equipped with Veshaille, but my impression is those forms missed too much for it to be practical, along with needing 40 dex with your mage to equip Voice of Velvet.
On other weapons other than veshialle, if you can find other weapons that approach a 10% critical chance in Awakening, go for it. I just stick with veshaille cause I haven't found anything comparable for my purposes.
None of these are optimum builds, although I'll admit I had a few extra stat points because of duplicated tomes-say 30-50. Also, you can only equip significant strength boosting gear like clamshell if you have the arcane warrior spec or that level of strength to equip it.
On PC, there might be a few extra ways to increase strength to a relative level for Bear and Spider. The speed of Swarm Form means it might do the most DPS compared to the other forms, and it's a lot easier for a mage to increase magic.It's all about what sort of shapeshifter form you like the best.