Thats not helpful....

I know, it break, but i am not sure if Root or Mezz or both. If I have no Clue, maybe u have the Answer?

And why is Insta Disease the most basic mechanics important Thing of that Class. I can fine without that....

Guys, please you were so helpful since now, don't turn this post into a flame war
Everyone's comment is welcome here, as soon is costructive!

Back on the subject: so is better to put the remaining points in cave for dmg if i understood correctly?

If you want to spec in cave, you need 27+ or none at all imo. The insta disease is very nice when you need to escape from angry tanks, and for interrupt while the same ones chase you.

in my opinion u should spec 27cave (insta.-desease) and 46aug (red s/c) for rvr, if small grp or fg.
the 8points in mend are enough to cure poision and desease, and u will be able to heal 200+ per spell, should be enough.
its the best mix i guess

46aug 27sub 8mend
Any other spec is kinda dumb if you want to do rvr.
Going for a yellow s/c is a waste since you will have conc. left if you buffed your 20 spells(hellloooo endu buff).
Going for a red d/q won't get the all the important buffs for your group out.
If you go for Mending > 8, if you need to heal as a shaman, your group should be dead in the next 20 seconds.
Last but not least, instant pbaoe deasese is way to important. You need it to rupt groups of people if you got pets/melees on you.

RAs:
purge3, moc1, dex2 , mcl1+sere2-3.

And yes, you need purge3 due to the lack of nearsight heal. Well you could do just like <insert random shaman on uthgard> and be in close combat the whole time and die. Your choice.

thank you mates!

Ormilig covered everything it seems.

For RAs Purge3, MOC1, Ichor1 and Aug Dex 3 is a good start. Then you can start building up passives such as Aug Con, Toughness and Avoidance of Magic. Most groups will either train or assist nuke the shaman and in that case, being that extra tanky can save your life and group.

Vehement Renewal(Insta group heal) can be a lifesaver as well and Mystic Crystal Lore is quite nice but a shaman should be casting offensive spells 99% of the time so getting a MCL off might be tricky.