Thread:AverageAmasian/@comment-205.254.147.8-20150826162229/@comment-26455864-20150901194229

Phantom Gizmo isn't required for your mitigator, it just makes things easier since it'll be easier to have his BB/SBB up every turn. However, if you have an Aaron, why don't you use him instead of Darvanshel for Trial EX3. His ES has BC on hit and he serves as an instant BC fill. He also has higher stats being a 7* and all.

For Frontier Gate, I did not use the item set, but the Vitality Boost Lv. 3. This boost helped immensely since the HoT helped with Granvalm, the lifesteal is useful, and more HP never hurts. For Aaron, if you're willing to, you can put White Armor on him for the last two stages. He loses HP (but with double HP leads, the loss should be negligible)

Also, you can use a Rhoa friend and use Kikuri instead of Zenia if you want. This will allow for BC on spark (which is easier to achieve if you know how to spark your units) and will also give you a chance to curse Granvalm, which is useful if he does get cursed. You also don't lose much from this switch as Vertri has the 30% fill rate on his SBB along with 8 BC fill.