L&M Limited Hero Battle - I just came back a couple weeks ago, why is there an actual boss character

Thank goodness I logged in for a little while when they gave out the free brave Ike/Roy, there was no way I was doing this otherwise All you really need here is Brave Ike/Roy with base kit + Potent 3 seal, Reyson or Leanne to dance, and Duo Micaiah to finish off Sombron and tank the AOE attacks Mist with restore helps, but I'm not sure if she was really necessary Basically you just kill everything with Ike, and bait out Lyon so you can player phase him safely Sombron is the most complicated part, but really you just need Micaiah to be more than 2 spaces away from Ike and have Ike and Sombron within 3 columns of Micaiah so you can duo skill, refresh with Mist if necessary, Attack with Ike, dance Ike, and finish with Ike