Agreed man. I've taken down stage 3 folia th's and krakens but even with two lvl 30's on my team and pretty good team work we lost to a stage 2 or 3 wraith with him barely at half health. They're hard to track, hard to keep sights on even in battle, hard to trap even in the dome, and they deal huge amounts of damage with some insane attacks and the decoy to throw people off (which I never had an issue with).