I believe that an alnico Warpig would sound crushing in that set up.  Personally, with the guitar having ash wings, a maple neck, ebony board, and a floyed, The Warpig would give it good ass, and cut some balance out the bright a bit.  It will sound plenty tight in that tuning, especially if your guitar is naturally bright.  
My friend has a A5 WP in a les paul custom, and its pretty fkn tight and crushing.  Not to dark at all.