Well the issue actually ended up being the bridge and tailpiece/studs I swapped. I wanted nickel (it’s an lp custom with gold hardware), and wasn’t expecting the swap to do much totally. Something about that particular nickel bridge/tailpiece was robbing my low end.
So I ended up with an Aldrich in that guitar with the stock hardware. Sounds killer. MCP Angel Dust and Tinenerd Psykes were also cool sounding