Hello. I'm Yotka from elitist jerks - the guy that theorycrafted diseaseless blood.
#1 Expertise is 26 (not 24 or 25).
#2 Hit cap is 8% or 263 (231 with a Draenei).
#3 Spell hit cap is 11% in a raid situation (288 or 262 with a Draenei).
#4 Blood Death Knights open their rotation with DEATHSTRIKE because it isn't dependent on diseases and gives you Abom's might - more disease dps and more dps overall.
Sorry to say but your guide is an overall bad attempt.