It's fun to see Gustang actually dodge attacks before counter attacking; but, at the same time it's feeling more and more strange to meet entities in the tower that can threaten family heads ( Akrinak in Yama, Léviathan, and now Enkidu...). Who knows, Enkidu may have slaughtered another unamed irregular, the 14th GW who happened to have been a teenage love caught between Gustang and Traum, (a love triangle between Traum, Gustang and the teenage girl) she may have preferred Traum while Gustang was madly in love. Then Traum's latest pet from the Workshop actually slaughtered the hell out of her when she tried playing with it and it became best for both FH to seal their memories of her entire existence, and also for the remaining FH to forget they were 14 and ended up 13, and then 11 (10+ Zahard). From such spéculations we can partially understand why Gustang said to Traum that he'll decide wether to kill Traum or not once he fully remembers what happened in the past. And, poor Léviathan who's been punished for billions of years to keep remembering how a teenage love was brutally murdered, while being sealed all that time in the almost unbreakable Nest ; such an extreme maltreatment.
Thinking about it, why the hell would Rachel expect Gustang to help her absorb Enkidu, a beast he himself has to dodge attacks !?
Oh! Crack pot theory: the Existence of beasts that can actually pose a serious threat to the 13 GW, Levi, Enkidu, the thing in Yama... May actually be the real reason why Fug believes they can actually defeat the FH; just imagine if White actually absorbed a beast like Enkidu, then Gustang will have to seriously dodge his attacks... That may be the secret meaning of Arie Hon's words to White :" stop training here, go out and come back once your a beast/demon"