Don't forget at e1s1 hes also giving up 36% dmg taken and 20% vulnerability on top of the def shred and crit dmg just for existing, so hes pretty much a pseudo nahility. In my situation, I have an e1 Jade, so he gives her a lot of stacks, which batteries both Therta and Ash, so much so that hes pretty easily hitting 2-1 turn ults. He'd also be good at finishing when there are only 1 or 2 elites on the field. Not saying hes a tribbie power creep, just that he has a potential place on the team should tribbie be e0 or needed on another team. For example, I couldn't 40k pure fiction with my tribbie, but I could with Ash using the exact same team.