I actually tried using Archeops in Pride's tourny here, and it was quite underwhelming. Sure he does a lot of damage, but it's extremely hard use it more than 1-2 times. If you try to use Acrobatics like I did, you basically sacrifice the use of an item, aside from the first Flying Gem boost. The inability to use Life Orb or Choice Band is surprisingly detrimental. Without those power-boosting items, Archeops has a hard time OHKOing many Pokemon, meaning he'll take a hit, which will almost always put him below that 50%. After that, he just becomes dead weight to your team.
If Archeops is used, I think it'll be relegated to being a Choice-user. With what I've seen, Archeops just can't work as a dedicated sweeper. Without Life Orb or boosting moves, he doesn't have the power sweepers need. If you do use Life Orb, it will take very little effort to put him below 50%. With a Choice Scarf, Archeops could function fairly well as a revenger. He has just enough moves to pull it off. That 140 base attack would love having Choice Band as well.
Archeops has a lot of hype going for it, but I don't see it being any more than Regigigas or Slaking were last gen. The benefits of Archeops just don't make up for the support Archeops would need.