Volatile Blood Seer

this is the first deck ive ever built and i really would appreciate some help feedback. i built this list specifically to beat junk rites and naya blitz. all of these cards have surprisingly amazing synergies, but the sort of key cards are exquisite blood, duskmantle seer and volatile rig (pre-board). when the rig explodes, you give it lifelink and insane things happen. i considered diregraf ghoul, but i dont like that it costs 7. post board aggressively mill, make huge wights and aberrations and beat face. deathrite shamans green ability should probably be ignored, hes there for ramping into a giant mind grind, or removing key cards in yards (exquisite blood will gain you life that way too.) its a fun deck and i honestly do think it could win a big tournament if yall can show me how to make it better. thanks.