Feel free to add your own results for various things that can stack. I tested Circle from the Talents along with the Circle Legendary, and it does not make rip any shorter when you stack both (at least according to the tooltip).
So I am using Circle from the talents, and stacking that with Draught (leggo), which seems to work nice.
My battleground load out:
BcGAGX1kx6Mci9Zl2t+S+sRoPCAAAAAAQIFSikkESDgkEJJAAAAAAkCICASIJSSCAtEpkAAAAAAAAA
PS - Hibernate and Cleanse Corruption should be native with no points required IMO!