I kill much faster with Dual Swords/Knives but then I have them maxed out on their levels while I was using the Evening Bow (Nagi's Bow) and it's at +0 and thus I did a Phase Quest (Phase 4 Quest I believe) which was against a Bladewing and it took a while to kill (15 minutes about).
I think my Dual Swords wouldn't saved me 5 minutes but then I had Nagi on the team and I was using a Healing Build for my Bow and it was just put together. I might need to do more research on Power and Healing Bow Builds.
"Invoke... VIRAKIN SOUL!!!" ~ from my Virakins global manga project. Official Husband of Caster of the Fate/Extra boards
But the Eye of Truth Mask is a common "break all parts bonus" item for both normal & ex-maps bosses no ? Shouldn't be easy to obtain most of them with low-ranked missions bosses ? Its sound less tiring than mitama farming (by the way i've cleaned my fiftieth ebony and ivory mission, i got one mitama ! two left to go yaaaay o/ ... THIS IS DAMN RIDICULOUS)
But the Eye of Truth Mask is a common "break all parts bonus" item for both normal & ex-maps bosses no ? Shouldn't be easy to obtain most of them with low-ranked missions bosses ?
at least for mitama, we have Heroes Guidance to help, and mitama didn't need to break all part. While Eye of Truth is a rare drop from breaking all part (Wings and Hell family is annoying to get EoT), and none of the boost could help us getting a rarer all parts drop (Appraisal only helps in purifying). Lower rank boss also have lower chance of spawning an Eye of Truth.