at least for the first two exes this expansion you can have 3 dead players for several minutes and still clear if your remaining teammates are competent enough as i learned recently. that sch was a diehard in the hydaelyn fight

another note: my healing bunny was ecstatic that she got to use miasma 2 again as a sch in criterion. I'm not sure why, its 2 ogcds a minute from the window made by gcd dot