Not sure why you felt the need to make a second thread when you could bump your previous one.
Q1. Personally every unit I plan to use I level to 50CC50 (or whenever I can start using a Plat can for Gold or higher units in the low 50's) then Gold farm afterward (I'm not close to finishing yet though).
Q2. I would look at
key kii's videos (since your accounts have Bashira) to determine if you can safely do the Orb dailies (keep check on UP though some missions you can afford to be light on it (Not Friday though)).
Q3. If you have males that you use on your team yes, you can easily get 1 male to 100% with a full day of doing H
it's stupidly easy to do.
Q4. Like Q2 watch vids to determine if you are able to.
I notice both accounts have Eunice, but don't have Mortimer any reason for that?