Advice needed for paid gacha

Definitely the Cavalry banner. Pray that you get a good support (Tamamo/Waver), a monster damage dealer (Cu), star generator (Jack), or my favorite (Ozy). One thing for sure, do not focus on what you do not want. This gacha has a mystical skill that can sense your wish, and focusing on things that you hate will simply give you that bad luck.

You want to try? Believe in your heart that Medb and Vlad is bad and you don't need them. Say it before you press that goddamn 10-rolls button. Jk.

Good luck. Since this will be yor first, anything is good

The only thing that makes this decision tough is your need of a good Saber servant, so I can see the dilemma. But I wouldn’t risk it and personally I would go with the Cav banner. Your fine on archer and Lancer so if you don’t get Altera or Mordred you’ll probably wish you went for the Cav banner. Overall they have better servants and you could improve Rider, Caster, Assassin and Beserker with the potential SSRs in the Cav banner, instead of Saber with the Knight banner. Pound for pound in this paid Gatcha, the Cav banner just has better servants. I wish you the best of luck with your pull! If you want to share who you pulled I’d love to hear!