I`m not really good with using Lina`s skill for battle since they give specific amount of exp comparing to other rage spirit skills that get much more exp depending of dmg they done. Lina on other hand lvlup slowly mostly on her passive skills. I mostly use her in first/second round and after that use other mass rage dmg skills and when Lina get rest most of enemy army is already decimated, and using Lina for rage get me only few exp points, not much of a gain. But as you said, different play style
