GUDAGUDA Final Honnoji Rerun Should You Roll (Week 2)?
As usual, this is just my 2 cents on each servant. Whether or not you choose to roll regardless of my opinion is up to you. Do note that I will only be discussing the SSR servants of this banner.
Source: Type Moon
1. Sitonai
Source: pixiv mishiro 73009013
Sitonai is an ST Arts Alter Ego. She is a fantastic Arts DPS Servant as she has both good survivability and amazing NP Spamming potential. She is particularly strong in Quests with a strong Cavalry Class boss (Rider, Caster, Assassin or Berserker) as she has strong Arts buffs, a 30% NP Battery and a self Invul. However, it is vital to note that she does require some support to reach peak performance as her own damage buffs are somewhat weak and she lacks any form of Crit steroid. Nonetheless, she is a good primary DPS servant for any quest where you'll need to deal with a bulky Cavalry Boss.
2. Cu Chulainn Alter
Source: pixiv ショースケ/お仕事募集中 75655708
Cu Alter is an ST Buster Berserker. You know how Berserkers are notorious for being glass cannons as they have amazing DPS but terrible survivability, that doesn't apply here. Cu Alter is a solid steel cannon as he not only has ridiculous Nuke potential but is damn near impossible to kill if he has proper support *cough* MERLIN *cough*. Usually, I don't recommend Servants that aren't Limited but since Cu Alter hardly ever gets a rate up and is Story Locked (ie he can't spook you because he is locked to the Story Summon Tab), I highly recommend pulling for him if you have some SQ you can spare from you Castoria reserves.
I hope this was helpful and bid thee Masters good luck in rolling.