The link isn't working for me. But I had an Abraxas with a similar string gauge and I thought the sound/bass was flabby. I could get it to sound good on my guitarport with a lot of EQing, but with my little marshall I didn't like it. It sounded great in normal tuning though.
Maybe a ceramic pickup, Miracle Man, Painkiller, Cold Sweat or higher output Alnico-pickup like a Nailbomb (love mine) or Warpig.
You say rock, but its a little vague. I would guess B tuning would be some heavy rock. Have any examples since the link isn't working?