I am running V2 3 Brothers Antifoams in mine. I definitely would not say they suck but I think my Tusks do a bit better. They are not fully broken in yet though. I like JConcepts Green compound. I think Predator can be too soft in some instances and G8 can be too hard. Predator would probably be really good on the Trepadors though.
I've never had a set of Predator compound tires, my experience has only been with the M2 and G8 Proline compounds, but Predator being too soft seems to be the general consensus. Lots of people doing well at our competitions with Proline tires, but I haven't really asked around to see whether people are mostly running G8 or Predator.