I need input for my Destiny picks. I'm generally aiming for story-locked servants unless there's someone specific I want but have hit some snags.

1. Is having Berserker Ibuki NP1 good enough that I can ignore the chance of grabbing Summer Jeanne in favor of either Story Tesla or TITS Durga?

2. Is Reines REALLY that good if I have pretty much every other premium support other than Lady Avalon? Like does it justify her spot over knocking Medb out of the Story pool?

3. Mama just got buffed but I've yet to see her actually matter where as I've seen Berserker Kintoki actually see use. Tits or COOL?

4. Is Avalon mechanically good enough for someone with Oberon/Astoria to justify taking her over Tiamat who is a cutie?