I have just tested cloud walker multiple times in mock battle, and it seems that his ultimate skill is either bugged or not working as intended:
1) The actual aoe effect is smaller than the graphics indicates. Often times the enemy would stand within the graphics of the ultimate skill but take no damage.
2) His ultimate skill no longer does any aoe damage to secondary targets after the primary/front-most target dies.
I'm not sure if anyone else has noticed this, but could Betty check on this and give us some feedback?
Thanks