Help with a Beast Master Macro

[halabar]

Ok, the new fangled castsequence tools have me intrigued, so I tried variations of the following...

#showtooltip
/castsequence reset=combat Arcane Shot,Arcane Shot,Cobra Shot,Cobra Shot,Arcane Shot,Arcane Shot,Cobra Shot,Cobra Shot,Arcane Shot,Arcane Shot,Cobra Shot,Cobra Shot,
/castsequence reset=0.5 7,Stampede
/castsequence reset=0.5 6,A Murder of Crows
/castsequence reset=0.5 5,Fervor
/castsequence reset=0.5 4,,Bestial Wrath
/castsequence reset=0.5 3,Rapid Fire
/castsequence reset=0.5 2,Focus Fire
/castsequence reset=0.5 1,Glaive Toss
/castsequence reset=0.5 Kill Command

This doesn't quite work. Depending how how stuff is swapped around, some spells don't fire, others do. Is this an inherit limit in this system (or I could be hitting focus problems as well).

Any ideas on how to improve?

In the sample above, Glaive Toss never fires, but if I swap it around, it will fire off, but then something else is limited or cut off. Perhaps hunters have too damn many cooldowns to make this work correctly.