@Dreadvane I added an accidental character at the end. I have fixed this and will post the new update soon. Thank you for pointing it out. Until then delete the extra character and click save (the line should look like this: /targetenemy [noharm][dead] ). As for the Mend Pet, I was/am using it as a filler to space out the timing of the Cobra Shot. If you prefer not to have it, click the new tab at the top and disable that box of code, save it then go back to the configuration tab and use the drop-down box to set tab 2 to whatever scenarios you need it for 
@walt1967 if 150ms works for you awesome 250ms is just what I made the macro at using my toon (bear in mind I have different internet speed, pc speed, and my toon would definitely have different stats and abilities). There is a popular thread going on at the moment with discussions towards this end. In the end, my 250ms is just a recommendation, find an ms that suits you, your toon, and play style The post I mentioned: Guide: macros, WoW, you and more
@newbiehunter please follow the information I gave @Dreadvane this should work for you too. Let me know how you go!