I skipped a lot of mp5 for +heal, sitting at 1700 heal and 150 mp5 unbuffed with hp stacked, because i'm allways flasked and chain jugg on new bosses, have a shadowpriest in allmost 75% of my fights (ssc/te).
Chain jugging provides me over 100 mp5 easily, add mana regen from bow, tide, spring, weapon oil is worhty of 400 mp5 at all. And then add a shadow priest - if that isn't enough, 30 another mp5 won't handle it, to. But you
need your chainheal to shine, and it's the only way to compete with flashing priests and paladins on high dps incoming fights as a camphealer (or spamming lhw aswell).
30 mp5 is not one overhealed lhw per minute, so stay calm and watch your healing tracks on sraidframes or grid, know the other healer and get the maximum out of it.
I'm 0/0/61 and i'm loving it, nature's guidance saved my butt many, many times on trash and maybe once every 3rd day on a boss encounter. And i like to pvp a bit, it really helps me surving assist trains better in 5on5 Arena.
There is no encounter i could think of, another 600-800 mana from Ancestral Knowledge would had saved me. It might be nice for starting new shaman and equipping him through the heroics and karazhan, but with starting really raiding a "third life" beside ankh really matters more.
I could add another 800 mana for losing 1kish hp, but i like my 7500 hp, because our warlocks tend to sacrifice their imp and i really recommend 9000+ hp (working on 10k at the moment) for further SSC and TE. But maybe i just lack movement skills
