You guys ready for the insane power creep in the next two weeks?

Caster Berserker Artoria is the best ST Berseker and ST servant in the game, so she's a must roll.

Summer Kuro is a must because she allows you to 3T loop with pretty much every servant in the game.

Ruler Melusine is one of the best AoE arts loopers in the game due to her 80% np charge and her bonus damage versus Earth and Chaotic enemies.

If you're a Oberonlet for some reason, then you also pretty much HAVE to roll for him.

Same with Ibukilets. If you don't have her, you probably want to roll for her because she's tied with Arjuna Alter and Morgan for the best AoE looper in the entire game