The big difficulty with Moody is that it takes a long time to set up, and due to the unpredictability of the boosts, you have to track exactly where you stand boost wise at any given time. Over a long streak, this can be a real headache.
Moreover, with that team, you still have to deal with all the situations where you can't get an Entrainment off (Fake Out, Protect, Volt Switch, evasion items, etc.). You can either devote a second pokemon as a lead designed to ensure the Entrainment is successful (as yadazhai does on his awesome 1001 win streak), or try to use two sweepers that can do okay without the Entrainment and cover the pokes that trump TruAnt (as I did on my much shorter 546), but I fear Octillary alone won't work. Without a successul Entrainment, that Octillary loses to way too many things.
So since Octillary seems to lose on both speed of setup and certainty of success, I'm wary of building a TruAnt team around it.
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Jumpman16: Time remains the great equalizer in the Subway