Lightning blade healer!
If you go with the force tree, that will be really helpfull for you and your guild. Its mostly the res and harmony skills that will be usefull, so concentrate on them if you feel you dont want to spend too much sp on it.
The higher you get, the more will your ressing skills count because not many people are willing to take force all the way up. Its really annoying for your enemys when you fight them and as soon as a guildmate or a friend dies, you res him/her and continue the fight together. Yesterday I was out hunting with a nuker and thanks to my res we manage to pull of some hard fights. One guy even used 3-4 res scrolls just to try to take us out. What a pity...
My res don't cost any silk
