I raid 31/20 as a healer, and if anybody has a problem with it, they can continue to have their opinion. I’m not respeccing because they want me to.
I have 2 sets of gear, and my health set was the first one I obtained so I could keep being valuable in a raid environment. I don’t raid dps, I only heal.
Chain Lightning is nature dmg, so yes Chain Lightning works with it.
Mana is a huge issue, and I have mp5 as much as I can to try and balance it out. But you will always need to drink frequently. Just part of being the Shaman.
Play what you want, how you want to play it. Don’t let others dictate how you play a game that you pay for.
Troll is actually the best PVE shaman race because of berserking giving you the extra cast speed, but Orcs have the stun resistance and is better for pvp.
All in all, do what you want. Play how you like, and find a group that let’s you do just that.
Have fun playing the best class in the game!