Ah, I dint catch that you were alliance. Sadly I have no experience fighting av from the Alliance side, so I cant help you much there. Not sure if defending ballinda works quite as well as defending galvanger, since galvanger gives you some better cover against melee attackers (thats usually your greatest problem), but it might work. Strange that ally battlestandards does not stack. I havent done any testing, but I see both my battlestandard buffs, so I assume the horde standards stack. One problem you might get in theese aoe-frenzys however is fear. As horde I have wotf,trinket and fearward+massdispel. But I think it would be a lot harder without wotf.

As for kara, I allways do this in guildruns with teamspeak, and usually with close friends that I play with a lot so they know exactly how my boxing works. To clear kara (with the exeption of netherspite) took me some time to figure out good tactics for everything. But now when I know how I'm going to do it, and I have made good macros specifically for karazan encounters, a run usually takes under 4 hours to complete even with breaks/slacking. Just say if you need some hints on any specific kara encounters, and I can probably help you out. Its also worth mentioning that I spec my priest shadow for karazhan since that gives the locks a fair increase in dps.