I opted for Nozomi as tank for reliable survivability (less RNG) without sacrificing damage at all.
For those wondering, Anne, Greia & Lou were from Manaria Friends (another title by Cygames).
Q: Are you gonna summon for Anne?
A: Nope. She is a regular unit. Given the fact that we have incoming waves of limited unit - Summer Saren, Neneka (PriFes), etc, much better to save my precious jewels for these limited units.