I am impressed with your stride, Mythos. I would like to apologize for anything offensive I had said to you during my critique. I'm more passionate over my beliefs than anything else. The only point remaining is that she is too powerful in her fighting skills, especially considering shes had no prior training. You mentioned she was a natural with stealing, and that can be learnt over time, but wielding a blade is no joke. 
It takes many years to master that, much less summoning. Summoning anything would be a minor thing at best, even the most trained of mages have to surround themselves in their studies for what you proclaim to be learned on hand. Healing I'll give with the incarnation demon, but not being able to die takes away from the tension of the possibility of dying, don't you think?