User blog comment:Linathan/Unit Spotlight: Ice Bastion Zeldeus/@comment-26258826-20150827200940/@comment-26140304-20150827204355

Zedus isn't a damage mitigator, but I assume you're talking about Zeldeus.

Ultimately, it comes down to opinion. Elimo is used because she has the most efficient mitigation BB in the game and it heals all allies. Zeldeus doesn't apply much utility for the squad compared to Elimo. In most trials, most would recommend using Elimo.