She is very reluctant to enter combat and will only ever fight to defend herself and when she does, she hardly ever does any damage. As a result, she is somewhat difficult to level up, more so than any other follower, including Rolayne Twickit. If she is attacked by more than one monster in a Medium or Hard event she will likely have to teleport away quickly. A somewhat effective way of training Smiddi is to just repeatedly rush through easy treks until she gains the ability to forecast what will happen on each path at a high level of 92. Then, choose the path that's most likely to be quickest.