Elsa in general isn't very good in air to air due to her sorta meh air hitboxes and slow homing speed, so it should be avoided if possible. Aside from that, j.B and j.4B are *decent* but more often than not you should try to use preemptive j.Cs to just swat people onto the ground where you're strong.
If you get an air confirm off j.B just go into j.4B -> etc into communio
If you're in a place that can get a decent connection with the midwest US then i'll play you.