He is top tier for certain, but he does have a weakness
Low hit, crit and agl - evasion builds are good against him
1v1 even shadowlynx can 🔥 him
Glaciela is his counter
If a strong shadow mage shows up that would chunk him and other light tanks as well
Also low resist to some of the nastier status (charm, stop, paralysis, etc) and even more severe thanks to his slowish speed
Agreed. A tanks' sole purpose should be to aggro and survive long enough for your other units to deal the real damage. Any other things like 1v1/dps dealing and other BS are just an added bonus; though in team settings his support skills should be prioritized over any other skills. That and maybe "Shift Attack" depending on your team build.