Actually its not out of the U5 powerscale. The U5 are far stronger than even the average hero in Warhammer. If the games lore is true, then the U5 alone killed at least a whole army and is currently ravaging through the second one. A Hellpit Abomination already struggles to defeat a whole army. Thats just the official lore, if we count V2 mods as part of the lore too, then the U5 are part of the strongest characters in Warhammer Fantasy. We wont count mods though, but that doesnt matter, because the official lore has already shown that the U5 are above many others in regard to power.