When there was a tournament in RI3, it was all about stats, while the informant kept raising the prices for the characters.
It probably won't be the same with goblins; most likely, they will all be the same, at worst, two different "professions" + a boss with unique stats. We can expect bows and primitive weapons (spears or clubs). If there are specific elemental resistances, like golems (but I don't think so), then we won't be able to take much advantage of that. What we can do is match their speed or something similar. Whether it's necessary to buy information for this – I don't know, I'm not sure.