Help with my macro please.

This is my macro at the moment. World MS is usually between 100-105ms. My macro fails to trigger kill command and also sometimes dire beast. Can anyone help fix this?

/castsequence reset=target Serpent Sting,null
/castsequence reset=0.9 0,0,0,0,0,Kill Command
/castsequence reset=0.9 0,0,0,0,Glaive toss
/castsequence reset=0.9 0,0,0,Focus Fire
/castsequence reset=0.9 0,0,Cobra Shot
/castsequence reset=0.9 0,Dire Beast
/castsequence reset=5 Kill Command,Cobra Shot,Kill Shot,Kill command,Kill command,Kill Shot,Glaive Toss,Kill Command
/cast [combat] Dire Beast
/cast [combat] Rapid Fire
/cast [combat] Bestial Wrath
/use Blood Fury
/startattack