I can't even count how many times that Bubbling life flask and that quicksilver flask of Resistance saved my life!
There were a lot of blue Devourers and Seething Brines with Fast Attacks and Powerful Crits in my last map, and blue Zombies with frenzy and cannibalism mods, I couldn't even run through them or I'd get fronzen, perma-stunned and quickly taken down.
At least, my equipment had a lot of life gained on hit and life gained on kill, or else I would not have survived the last 10 minutes.