As a master thaumaterge my school is, and hopefully I get the words out right, focused on resistance and damage. I am currently level 43, so I cannot get Dargonspyre gear. Although my mooshu gear has high resistance, I expect Dragonspyre to be higher. And currently my resistance is higher than 10% (and this is gear any school can wear). In my opinion, resistance and damage is what should be focused on when finding gear. And for health I rely on daggers and rings, and then of course there are also jewels. So far in my experience this gear has done me good in a battle, and I expect when I get 45 level gear it will be better than my current stats, which are 20% resist and 15% damage. So, in shorter words, I don't think 10% resist is high enough. Although for your school you might think differently than I do when buying gear.
My resistance is in the early 20's and I'm very much like a storm glass cannon except I'm death with a low health 2,000. Anyway your probably wearing heartsteel and has equipped equipment with little resistance. This is fine though although if you want to get a little farther go up to 15 resistance.