This is the second time I have cleared this stage. In this video, there is very little RNG involved, only Malroth succeeding in sleeping and envenomating the dragon at the bottom at the very beginning, everything else is very straight forward. This strategy relies on having Kaleidocat at a high enough level and awakenings to be able to be able to survive one Missle from Metal Dragon and have enough MP to be useful, the first time I cleared the stage I did not have that as mine was still S4.The first time I cleared this stage, I used human form Orgodemir's Devil's Heart skill for increased damage taken debuff stacks. This allowed Dragon Lord to do enough DPS to kill Forest Dragon and Malign Vine essentially on his own given enough time to regen mana. The positioning I used is much the same as this video, but the Orgodemir method has another point of RNG in that Orgodemir also has to confuse Metal Dragon on turn one and then he and Dragon Lord need to kill it before confusion wears off.