Quote from SlandorSorry if this is old news, but I finally realized why I keep dying to reflect damage packs even after switching to a lifesteal weapon:
The life-steal-percentage of sweeping winds is locked on cast. So when I fight reflect damage packs, I not only need to switch my weapon, but also wait for sweeping winds to fall off.
I tried for a while to briefly switch to my (significantly lower damage) lifesteal weapon for some extra healing before casting sweeping winds every time, but wasn't really worth the damage loss for me. The healing was very noticable, but I only really need it on reflect mobs. Might be an option for some, though.
Sweeping wind probably bugged, cuz if you cast after blindig flash -30%- and healing dps -15%- buff you will get these bonus on sweeping wind until fall down.