[DD2] I only really ever feel comfortable playing with a dedicated tank, how can I change that?

By tanks I mean Poet Leper, Carcass Hellion, Vanguard MAA to name a few. It's really hard to deal with enemies if I don't know who they're going to hit and going all in with three brawlers and a healer feels too risky for me. Specially when Dodge and Blindness and low rolls are so common in playthroughs.