Your source still does not give an absolute mininum for PvP targets, which I claim is greater then 1% + Hit talents + Hit on gear.

Explain to me how 5 lvl 49 targets can kill a 70? We have conclusive proof that it WORKS, you can LAND spells. Given even a gratious 10% with 1% + hit talents + hit on gear at 49 (shaman talents are pretty uber), you're talking a 5 people casting at a 10% chance of hit.

(90% miss)^5 = 60% chance that all 5 will miss.
40% chance that at least one will hit.

How long would it be the absolute maximum for 5 dots to land?
90% chance that within (4) gcd, you'll have at LEAST 5 dots.

10k health?

Come on, this is IMPOSSIBLE given a 1% hit chance.