The following is not rounded in regard to stats, but the concept shows a way to put something up that is challenging and gives the players something to deal with without using Armour, TB or negating the Force Weapon entirely. I hope it is useful as food for thought. Simply ramping up stat X is usually only adding to the arms race.
“The Rip that Tears itself” (Unaligned Warp Entity/Daemon)
The kind of thing a doom cult like the Pilgrims of Hayte would seek to summon. “The Rip that Tears itself” appears as bright, billowing web of edged “rips” in reality with writhing tendrils of light growing out of them, turning into rigid “cracks” that add to the “web” and making it more solid while half-heared whales and mad laughter appears and grows louder...
WS:(w+15) BS(w) S::(w+10) T::(w+20)
AG::(w) Int::(w) Per::(w+10) WP:(w+15)
“The Rip that Tears itself” is not really “Dodging” but becomes ghostly insubstantial. Different name, same effect
Daemonic; Daemonic Presence*((w) in Meters; -10 on Willpower); Fear 2; From Beyond; Warp Instability, Hulking; Hoverer
Psychic Attacks: “The Rip that Tears itself” uses the equivalent of “Bio Lightning” and “Flash Bang”. It has “Psychic Trait” equal to (wounds divided by 10, round down, minimum of one)
Trait: The Rip widens
[Half Action] “The Rip that Tears itself” adds 1d5 wounds to its current number of wounds at the end of its turn. This may increase it Wounds beyond the 30 “starting wounds”.
Trait: That what is me, spawns me
Every time another entitiy uses a Psychic Power or Sorcerous Power within the Range of the Daemonic Aura, 1d5-1 “Rip Moths” (see below) will manifest at the beginning of the next turn. Ignore this trait if the “The Rip that Tears itself” was destroyed or banished at the end of the round that the Psychic Power or Sorcerous Power was used in.
Trait: “IT IS OPEN! IT ! IS !! OPEN!!!!
What happens if “The Rip that Tears itself” reaches 100 wounds? Having it turn into a warp rift with 1d10+2 daemons of chaos manifesting is a nice option, but so is anything else the GM wants to brew up.
Treat them as “Flying Creatures” (DHcr;349) with the “Daemonic”; “From Beyound” and “Warp Instability” Traits. Every “Cut Fluke” starts its existence somewhere in the Daemonic Aura Radius of the “The Rip that Tears itself”. Its first action will be to attack the nearest living thing in reach, then it will spend its further actions to reach “The Rip that Tears itself”. If it does, it “melts” it and adds 1d5+1 wounds to it.