If you use Speed III as well it's about 25k RF/t.25k rf/t seems steep.. I use an ender quarry with silk touch addon and it uses under 5k rf/t
Well, to be fair, I'd say the crazy power gen of Rotarycraft is end game, especially in the latest versions. But if you are going crazy power gen end game, there's no reason not to go reactorcraft. Even the HTGR, with the right setup, is capable of 131k+ RF/t.Blood magic lava crystals.
Once you can automate LP production (all you really need is a mob spawner and a decent sized altar) you can pretty much run your entire base off it.
Alternatively, Rotarycraft generators are wicked. Enough mod progression to max out two rotational dynamos and you'll be set