That’s my exact setup right now. I too love the sounds I get from the Arkham. The beast replaced a WD800 for me. Very similar setup it seems.Just bumping this to reiterate how much I love the Arkham preamp design. I'm resolved now to replace my WD800 with a Beast when the cashflow frees up. Then I can have a direct board with my Oracle, plus a head option for when I need an amp.
Sometimes I consider simplifying to a powered cabinet and selling the subway cabs I use with the beast and selling the beast as well so I can just have a scalable rig. Just pedalboard when I’m PA only, add the powered cab when required and then DI to PA for anything larger.
But good powered cabs aren’t cheap and selling stuff is a lot of work so probably will keep running this setup for the foreseeable future