Here's a conversation I was having with a friend about Brenda, who is a decent healer, but wants to take it to the next level. (Note that his comments below are about her armory link at the time of this posting, and what you see in the link of course will change as her character evolves.)
His comments follow, and I think they're good advice for all healadins:
Uhm, yeah 61 holy is...over the top.
She's got all the good talents along with a bunch of the so-so stuff.
The double prayer books is an excellent idea, they are a very good intro trinket. With the amount of chain casting a holy pally does due to their mana efficiency an upgrade to work for is the trinket off the last boss in Black Morass that procs spell haste.
The amount of tank stuff in there is limiting the mana pool, as is some of the lower level gear. The upside is she's obviously not afraid of equipping non-plate which is also a healthy habit to be in. Her +heal is pretty solid considering the uneven access to gear she obviously has.
She's honored with Aldor so the lack of a shoulder enchant is unacceptable, no matter what the economy for Fel Armaments is like on your server. She needs to grind out the last 3500 (thats 2 shattered halls runs as memory serves) to get revered with Honor Hold which gets her a head enchant and a ring. I took both into kara and replaced them with epics, they are solid choices.
There's a cloth head from CE at revered that is also very solid for healing, though its a bit spirit heavy since its aimed at priests. Spirit is a useless stat for paladins, its a priest/druid stat and the gemming for socket bonuses (especially by using a spirit gem) needs to stop. Socket bonuses are 99% of the time crap, especially on healer gear, doubly especially on non-healer gear on a healer (hit rating?!). While attempting to boost the mana pool and regen rate heal/int, heal/mp5 and int/mp5 are all acceptable choices. 55mp5 while casting will starve her on long fights, even with BoW up and Divine Illumination.
There's nothing horribly wrong with any of her choices, a lot of them are just reflective of someone who doesn't deeply understand the class mechanics at work and so is doing the best they can. And like I said there are some genuinely really good choices in there, so either she's figuring some stuff out or has the good judgement to listen to people in the know on at least some things.
Despite what some argue I feel that using Healbot and Decursive can be a good way to help someone get up to speed. They take some of the annoying work out of being a healer and allow you to work on learning the hardest part, namely learning to actually heal. Watching for damage, knowing when to be reactive and when to be predictive, controlling mana usage, managing cooldowns, etc.