blood rotationFollow

I hate to be the guy to be so lazy as to not search through the forums, but i have been out of the game for 4 months. Due to active duty for our wonderful country. I am in need of help, in march i was at the top of my game, 4k+ dps easy in raids. Now my first week back i'm stoked if i can break 3k, and thats SUPER buffed.... what have i missed? Diseases are important now? im blood and have never used disease, may sound simple but my rotation consisted of heartstrike heartstrike oblit oblit and dumpin death coil, rinse reuse, that was it! well with the acception of my macro with my mirror of truth, hysteria, the self buff cant rem name been gone so long, and dancing rune weapon. wowarmory is down so i cant link my page, but toon is jmorg server is mug'thol. i know i still need a few peices of gear but thats not the problem, whats important now? like 8% hit 27% crit.. where should everything be like my expertise, armor pen, haste... and whats a good rotation these days. thank you