Is there a good guide for mistweaving other than the typical icy veins stuff?
Not really that I've found, icy veins isn't particularly useful. Most of my mistweaver knowledge is self discovery and random posts on the internet / talking to other mistweavers.
Basically I've boiled it down to 10 rules.
1) Keep renewing mists, chi wave, expel harm off cool down
2) use soothing mists as filler
3) never hard cast surging mist / enveloping mist
4) dump your chi as soon as you get it as there is no point in hording it
5) use thunder focus brew to refresh all renewing mists to double the amount of people that can have RW on them.
6) fist weaving isn't necessary but useful for light incoming damage and very useful in 10 mans if you're lacking in DPS.
7) if you're going to fist weave watch the muscle memory buff, it doesn't stack and you never want to waste it.
8) If you take chi torpedo take celerity and use it as often as possible since it has no mana cost and is great group healing, alternatively if you take rushing jade wind use it as often as you can without it being a burden on your mana.
9) never glyph for mana tea, and chi brew is basically a mandatory talent.
10) revival is best used whenever it is necessary, same with cocoon.
Hope that helps.