Looking for advice, DARK SOULS™ II: Scholar of the First Sin vs Assassin's Creed Syndicate ?

2 totally different games, but if you don't mind take Dark souls. you will have more fun with it, for less money

I'd probably go with DS 2, but that's mainly because I'm not a huge fan of the latest Assassin's Creed games.

I always find Assassins Creed games to be not challenging at all (at least the ones I played so far) and thats what I'm looking for most of the time - so my vote goes to DS2, it's a great game imho (played through on PS3)

Dark Souls. No question.

Never played either, but dark souls, because it doesn't have uplay

Is that even a question? A crappy Ubisoft game vs an awesome RPG:

I've hated every AC game I've ever tried except for Syndicate - I thought that was great, and I got 70+ hours out of it. I'd go for that one.