Alright, so, to show what is common among Rank 4 Xyz Monsters . . .
[hider=Rank 4 Xyz Monsters with 2500 + ATK]
Bahamut Shark
Bujinki Amaterasu
Bunjintei Kagutsuchi
CXyz Mechquipped Djinn Angeneral
Dark Rebellion Xyz Dragon
Evilswarm Ophion
Evilswarm Ouroboros
Gagagigo the Risen
Gem-Knight Pearl
Heroic Champion - Kusanagi
Night Papilloperative
Number 102: Star Seraph Sentry
Number 104: Masquerade
Number 105: Battlin' Boxer Star Cestus
Number 32: Shark Drake
Number 39: Utopia
Number 66: Master Key Beetle
Number 69: Heraldry Crest
Number 85: Crazy Box
Number C32: Shark Drake Veiss
Number C39: Utopia Ray
Number S39: Utopia One
One-Eyed Skill Gainer
Shadow of the Six Samurai - Shien
Stellarknight Delteros
Vylon Disigma[/hider]
Now, maybe not all of those are amazing, but a number of those not only have good points, but also have REALLY good effects. And how many are at all touching the Limited list? Not a one. I MIGHT hit this thing with a Semi. (As in, Semi-Limit it . . . not run it over with a tractor trailer) Maybe. No guarantees.

4500 is until the end phase. Compare against Night Papilloperative. Or Dark Rebellion Xyz Dragon. I see Charak's monster as on-par.