Linking this to Dash and giving him a full energy bar at the start of the wave is the most frustrating implementation I have seen thus far.
I’ve tried every suggestion, upgraded several characters (including some I would not have) and none of them succeeded.
So this chapter needs to be redesigned so I’m not dealing with an invincible Dash who can one shot my team before I can remove his invincibility.
And please don’t bother suggesting strategies, all possible tactics have been tested, so it’s now a case of bad game design needing to be fixed.