Main arena team got easily overwhelmed, so...
This map is susceptible to B!Lyn / Healer cheese, as you have a good first target on the armour knight and a safer way to lower health with the lance cavalier. Lachesis is in Wings of Mercy range as early as on turn 2.
(In L!Marth's Abyssal map, I've not yet found a good opening tactic and I can't safely enter Wings of Mercy range. Lachesis gets obliterated when I enter enemy movement range.)
I dislike having dancers tank hits, but Olivia had to take one for this clear.