Units with critical shot negate evasion as it hits with 100% accuracy if im to trust what the wording is. Stug and other units with focus fire that give 100% accuracy also hit pretty much all the time at least the corrupted ones ive faced do so. Reason they tank better is also cause they can kill enemies faster and not take much damage in the process on top of the evasion and armor buff. Not to mention the cd on those skills are really low. It's also why starter tank Nika for soviets don't do so well further you go as she doesn't have a damage boost but only an armor and evasion.
E-100 from what i see is a one time use and tiger cd is so long you wont use it more than once in a fight unless your fighting Siegfried line or a destroyer type boss.