Kosher sounds like a broken record but he has a good point.
Currently on my Mage, I can solo everything in the game except Incarnation, Syrus, Malurna, and Avatar. Before I reset my stats to include dex, I had trouble with Fireknights and Kiara. Now it's a cake walk.
My basic strategy for Fireknights is to use Lure of Ice (lvl 10) as they are walking away from me and quickly queue up Ice Shards (lvl 10). With 580 Ice ability (almost lvl 59) I can usually take them out in 1 to 2 shots. That's where dexterity comes in, it gives me a chance to cast Shards a second time while under attack. Oh, and don't forget to wear a Greater Charstone Ring to reduce the damage from Fireknights by about half.
For Kiara I use Cloak of Fire then lead with Lure of Fire and spam Firebolt (all lvl 10). Dex really helps on this fight since it gives me a chance to cast Lure again midway through the solo. Also, I dodge so many hits that my health stays above Kiara's the entire fight. Usually I have about 1/4 to 1/5 hp left after the solo.
I know you guys think dex is useless, but don't knock it til you rock it.
