I would like to respond to the criticism of Retribution.
Note that I'm only at the beginning (middle?) of Act 2 and also use a mod so the Taunt bypass armor to make my life easier but it's still fine without it. I have around 50% reflect damage at the time.
I think Retribution is balanced. My tank phoenix dive into the enemy, taunt a few of them (let him engage alone if you don't use cheats taunt), and maybe buff my armor. At the end of the turn, my tank has done as much damage as my secondary DPS while tanking the damage. Even destroying enough physical armor for my other characters to CC the enemies.
My tank would not have done as much damage with his one hand or the shield bash. The fact that I can taunt enemies to mitigate damage and do a little damage on top for free is a great tool in my fights. I don't regret putting point into this attribute.
That's pretty cool. I had in mind to do this with my tank as well, but quickly realised how flawed it was in the base game. Without taunt working on armoured characters, there's no real point to go with a tank build because they're going to target your weak characters at the start anyway, as they should. Then your tank character is just standing there wishing he/she has more damage.
"Soft CC" should be able to go through armours by default (like oil slowing). This should apply to the Shackles of Pain skill as well IMO.
As a result I scrapped the sword and shield idea and just went with dual wield. If Larian change this, I'd love to try it again in a later play through and after seeing your post I'll add retribution as well.