Overall, in DOS2, I find tanking being pretty useless.
The AI is smarter than DOS1 and will target the characters with the least armor or hp.
Even if you bring your tank in the front lines, the enemies will slip pass him.
To compensate that, I picked taunt and yeah, it is just garbage by being blocked by armor...
I even picked the retribution skill to retaliate some damages I take but 5% per point is way too small.
It may be viable as a lone wolf but utter useless in solo.
After playing 50% of ACT 1, I feel like rerolling... and I am quite disappointed :(