Should update with newest hotfixes, Dragon Scales increases IP absorb by only 45% now.
Also with the reduced damage on revenge and nerfed Dragon Scales probably the best path in the artefact could change a little? Not much, probably i'd swap the revenge trait with the thunder clap one.
NS got nerfed too, 75% increase max. I suppose it will also affect the cap on IP stacks to something like (3*1.75) IP at 60 rage.
other than that, perfect guide! Good work!