In order for Tara to actually be good in Showdown reliably, she needs a damage buff. Even at max level, she still uses 4 ammo to take out a box and her reload speed is already very slow. maybe her new star power will change that in the next update.
yup, her new star power does heal according to Reddit. Still, she still needs a damage buff. She could probably switch from Mythic to epic and switch with maybe Pam/ I mean, pam is OP with her super turret, her incredible range and amazing damage at close range.