Yeah, you cut drones a little bit too early, and also the choices for economy and damage were odd. If you don't use the extra HP, trinity drone is a drone which costs G instead of 1 (slightly more expensive) and prevents you from using force fields later, whereas vivid is just straight up better value.
As for damage, hellhound is fantastic but Feral is only good if you utilize the prompt aspect. Odin, in the other hand, is just extremely efficient. I think this set should be vivid into odin into hellhounds, the only other thing which looks similarly strong is tatsu + bloodpact.
Your opponent also messed up by buying gauss canons instead of hellhounds.