Most classes can do 5k with at least one ability - make it a bit more specific. I see sorcs with 6k heals often enough in WZs and smashers with 6.5k, also as of late i've seen assassins/shadows with 6-6.5k hits in WZs. As a PT I average with 4.7/4.8k as my biggest hit in pug WZs - think the highest I've had has been 5.5, I don't pay much attention to it.
How many classes can do 5k instant hits that are aoe that can hit 5 people at once and autocrit? 5k is not even the most hit with it either.
They nerfed telewave proc because it was mowing down players and the numbers were nowhere near what smash is capable of.