With the Raven you’re limiting your power tube options, so you should do some@glow_worm also shows his ignorance on Raven.
A call to Dave or James and you will get the best advice on tube rolling.
I will say the same would be true of Kevan Deal at Upscale Audio on tube rolling for the Primaluna product.
Both Raven Audio and Upscale Audio are first class and you will get great support, I know as I also own a Pathos In Pol 2 that is in my vacation house.
Also with Raven it is about the quality of those watts not the quantity.
Punk.