Magus Corrupt Rescuer and Holy Talismans

So I'm pretty close to maxing out my MCR and I have 6 Holy Power talismans to maximize damage. But I noticed that the talisman buff stops at 3,462. Is it supposed to stop there, or does it continue to climb just without showing off a higher number?
Other than that I'm surprised how much damage she does and she's not even maxed out yet. I played the first level in ailing kingdom on normal so that it has that odd boost that I feel nobody really talks about, and I put a smite on the opponent and CR hit it with 59,414. Holy moly