midscreen one interesting, i go for the grave rot then mixup personally at the moment. after a quick test there wakeups seem to beat the air normal,backdashes aswell and grundy is in air long enough to react too kinda taking away the mixup of jump or no jump
but to be honest dont know why your ever want to do the corner one instead of d2,11~trait grab after the MB WC unless theres a reason to get a block string instead of free damage?
(even if going for blockstring when opp has clash he could just let him hit u,jump attack to trait doesnt jail and thats even if you got by the wake up)