I have played about five games with her. I realized that depending on Railwalk after the third or fourth turn will really hurt you, instead use it to hit and run the first two turns then bringing her in in three and four to clean up. Kaeris is also fantastic with her, between vent steam and flame pillars you can position your stuff far more easily, then when Mei hands out the burning tokens, Kaeris will accelerant and immolate. This can be even more awesome when the student of conflict. Student of Conflict with her is just amazing, handing out fast on those key turns really can turn the game!