The reason LFR is a bad benchmark: you can't heal damage that isn't there. Unless you're a total beast and can pre-cast your heals (predicting incoming damage) there's absolutely no way to get high HPS in LFR. In LFR just focus on learning your class mechanics. You need a try in Normal to get your feet wet, try an alt run!
Your gear and stats look to be fine. I personally would put the 2 talents from blessed resilience into Heavenly Voice. A 100% healing increase by Divine Hymn and being able to use it every 3 minutes is quite awesome.
mmmm, click healing is sketchy for priest. There are just too many spells and all of them are so useful - when you get used to clickhealing you'll find yourself mostly using those 5 in lieu of better tools, since the others are on your keyboard. Do you mouseturn?
I heal with mouseover macros, macros bound with modifiers on my hotbars. 24 keys on my hotbars, most of them modded. I use ALL my buttons regularly. Can't imagine trying to clickheal with a priest.
Other classes clickheal better. The ones that actually have 5 or fewer core abilities that make up 95% of their activity. IE all other healers.
In LFR (which, I know, isn't a benchmark) with single target chakra I'm hitting 8k/9k hps. With AoE chakra, hitting 12k/13k hps, is that enough?
Healing is good as long as noone dies and/or you end the fight under 20% mana.
If someone dies, it's in 70% of the cases because of to little healing. Then there is two things to consider:
1. Was the person healed to little?
2. Was the person actually healed but took so much damage that the healing was to intence to keep up?
Yes, I actually say that a dps standing in fire still did not recieve enough heals as fire is usualy healable but expencive manawise.
The other 30% are often oneshots or close to and is someone else fault.
Ending a fight with to much mana shows that you healed less than you were capable of.
Let others jump around doing nothing when it's nothing to heal. I've allways said that it's better to coninue healing if you can afford it through the whole fight than standing doing nothing ust so the healing won't go from nothing to alot when the damage finally comes. It's a very hard decistion to make when to continue healing and spend you mana or when you'll need to save it for later, that's one of the key things to learn as a healer and is proably the seccond hardest thing to master (class healing priority the hardest).
Ending the fight with some mana left does not mean you healed less than you were capable of. A fight only has so much dmg going out, any heals beyond that is just pointless overhealing. The only argument you could make here is that maybe you should drop a healer for more dps.
I managed to do DS as part of my guild last night, and I actually manged to out heal a druid and another holy priest (ok, I was pure AoE healing, but still) I don't think I was as bad as I thought.
I'm still not good at single target healing though.
For single target healing as holy, you would ideally be in Chakra:Serenity and keep a rolling renew on your target(s) of choice and refresh them with a HW:S instant cast or greater heal. If you need to bring up someone quick, do a flash heal or binding heal if you need help as well, stacking Serendipity, and then follow up with a greater heal.