IF is the hardest because the alliance bank is right behind the king. Also, IF is the place to space out if your alliance, much like org is to horde. Also, the king has an annoying knockback/ aggro wipe and if you fight him in his room, he has a tendency to knock your team up on a ledge on the wall, making him evade bug out and going back to full HP. This happened to me 4 times one fight, promptly giving alliance a lot of time to figure out what was going on and wtfpwn me. Guard spawn rate is not SUPER fast, but it is faster than normal i would say. But guards are nothing, just drop magma tots and they go down like nothing. I honestly never noticed guards doing it that way. I took the tram after killing king in stormwind. I didnt run into any Alliance until i started fighting the king.