That makes me pretty sad actually. Mephistophile had that game in the bag with more than twice your economy, and his ACU was perfectly safe under both a shield and TMD, surrounded by T2 flak and T2 PD. I don't know why he thought those mantis were such a threat, nor do I know why he would move his ACU out from under that shield/TMD.
Silly way to lose, doubly so considering that you moved your Deciever, so he should have known what those two buildings were right away.
Even though I wouldn't call it amazing finish, it was a nice one. You kept him distracted on the front lines, sending units all the time at his defenses, so from this perspective it was quite understandable that he might have not noticed the two small dots on the radar. Moving the Deceiver away was pretty stupid though...
It's the 6th round of the UEF tournament.