Annnd done. Only used one stone to continue on my first Odin dragon run on the top floor because I was short about 1khp eating her pre-empt and just wanted to see if I could solve the board to win, but messed up board so quit afterwards. Took a few more runs and tinkering around with my team to get it all set and it even caused me to canniblize my old school +297 Enchida to my Zidane as he was my only real choice for on color (green or light) that could accept devil killers. So team was Odin Dragon^Balboa/R.Meimei^R.Meimei/Viz^Aten/Momiji^Sylvie/Zidane^Bacches helper Odin Dragon had no assist. Board Solve was starting from bottom left light orb straight up to start a green cross bottom left and light cross upper left, make 3x3 green box upper right and finish with light cross lower right like.. Result Game plan was use natural boards on 1st floor, try to get a natural board on 2nd floor before 4th turn, use MeiMei or Momiji board on 3rd floor, get actives up on 4th and try to use a natural board to sweep, 5th floor use active to sweep, 6th floor stall for actives while healing as eventually you can die here as Hamal's damage is slightly greater than double Odin heal from LS. Floor 7 use 3-4 turns to stall, use R.Meimei and Balboa to sweep, survive with enough hp after adding 1 dark resist latent to Meimei and hp bonus on Viz from Aten assist. Then use Aten active for 1.5x orb move time, Momiji board and Bacches active for the kill shot. Thanks for @aFireBlaze post for the team build. Only took 1 stone on a failed attempt to continue, otherwise not bad. I still don't like how ridiculous some of these bosses are that basically require a pixel card stacked with the appropriate killers.