>Does the AG oversee the firing of FBI & DOJ senior/mid/lower staff?

yes

>How many FBI & DOJ were FIRED/FORCED?

over 30

>Does 'Russia' recusal prevent/block AG from this responsibility?

no

>What time period did this occur?

pre-Barr

>Who appointed and tasked HUBER?

AG

>Who appointed and tasked the OIG?

AG

>Who was AG?

Sessions