Iron skill cooldown reduction or +Raid Leader for sustain?

I’m running WW thorns with all 3 shouts and iron skin. I want to maximize my life sustain. Currently tempered all +Invigorating Fury and while that does heal me a big chunk, its only every 100 fury. Feels a bit inconsistent. Also read thats good with starlight aspect but I use the slaking aspect and I have no fury issues.

Unless your going with Fury cost increase (i.e. crown of lucian) I find raid leader to contribute to EHP the best. Iron Skin is great for emergency “healing”. But if your looking for HPS then raid leader is the way to go.