User blog comment:Linathan/Guide: How to claim your FREE unit (Brave Frontier 2nd Anniversary) & Lucia/@comment-10054175-20151031120106/@comment-99.238.122.100-20151031152235

I would suggest Chrome or Avant

Chrome is the best spark unit to this day (until drevas batch comes out)

and Avant's LS is just too OP to be in the game.