Well, it wasn't the most fulfilling and it felt a bit too easy in my opinion but there were some pretty good moments, like the final blow was kinda cool. Either way, thus ends the Training/Wilhelm arc and thankfully the arc had little to no on-screen training. As a whole, I felt this arc was a step up from the first two but I step down from the last one although this one has a far better conclusion than the boring anti-climatic Kyoto Field Trip one. However, despite the Field Trip having the worst ending it built things up better. This was rather quickly slapped together but it was at the very least, more enjoyable for me than the beginning chapters filled with jokes that never registered with me. The highlight was the flashback with Nagi. I wish the series was about him rather than his bland son Negi.
*Edit*
Also, I forgot to mention, there are only two arcs left but thirty volumes left. Yikes.