I never got around to playing around to achieve the most channeling but now I realized how easy it is to obtain. This calculator is one of multiple methods to achieve 75% channeling for sage SBs.http://mypers.pw/1.6/#95015
Note that the legs do not normally roll Chan but I have added -6 Chan for the rrr9 set bonus which gives -6 Chan with two pieces equipped. Obviously, this is not PVP or much DPS viable
but I do find it super useful in Celestial Tigers Event and such situations where you could need channel over damage (helping lowbies, mob killing, etc).
There are a lot of alternatives such has find a 9 or 12 channel neck instead of rolling 13 channeling on weapon, and more but this shows how easy it is to gain 100% channeling if you are sage. Even for demon SBs if you an get 6% channeling from neck and such you can still obtain max channel.
Luckily for me I already have a 9% channeling neck and everything else so I can't wait to try this out once rrr9 weapon is released. b:victory