Healing parses are bullshit. Thats the whole story about. Sadly, healers can read nothing good or bad out of it. You must find out by math, forums, or simply by yourself which way to heal is the best.
In my opinion: 100% uptime of lb shout be your target. Its not simply the hps generated by it, its the freecast-mechanic aswell.
Rank 50-1 works that way: "heh fellow healer!"
"Please dont heal next hc fight. Just make sure, no one is dieing. I want to log me!"
"Okay i play anub hc then."