Definitely, if you don't have Kerry with any cost reductions, no MR duelists, or just all around lacking in your lineup then sure Emilia can be worthwhile, especially max reduced. If the loli valk is introduced though I say people should farm that second level and cost reduce her instead if all you want is a cheap solid valk that can generate some UP. Better duelists will come our way and two of them are superior valks.