User blog comment:Miskos3/Fairy Tail Episode 238: Tartaros arc: Immorality and Sinners, Review/@comment-203.111.234.105-20150622035135/@comment-49.150.255.80-20150622044736

and Gajeel as well... Maybe they just put the important parts of the arc.

and honestly speaking, Gajeel's and Mira's battle are just subplot for the arc.