I think Ayala could win it all, honestly.
I think Arnold absolutely could contend for AA at 174, but peak is in the 5-8 range, depending on draw (and injuries I suppose). He could also go 0-2. At 184 I just don't think he is grown enough for it, yet.
Teske could AA and I wouldn't be surprised. It would be very draw dependent, though. There are a lot of solid guys coming back next year.