I'm a pure hybrid and can tank 5 or 6 mobs before I start struggling.
I rarely die and if I do it's usually due to a massive lag spike (10 seconds or more).
The last time I died due to overload of mobs was when I was grinding scorpians. I was fighting a giant, then two champions spawned next to me, about 5 normal scorpians wondered over and then another champion joined the fray.
I lasted for about a minute before I had to retreat, then I spammed some pots and used my multi monster bashing skills to kill a couple of the scorps before LAG and death.
I have lots of screenshots of me tanking 5 or 6 scorps
Pure Hybrids are awesome, everybody just refuses to believe it.