Did you mean Jewels? Gems don't get you SSR draws, yo.
And yes, for Jewels, the rate up basically doesn't exist. For real money draws, the rate up is (supposedly) 20x, so your chances... what, 20/70-ish? And notice, this isn't per SSR, this is per SSR HIME. ~1.8% chance to pull SSR Hime and from there, it's 20/70-ish chance.No, that'd be Fenrir without a doubt. Fafnir is really shitty since you need at least 2-stars she before it becomes better than event Eidolons, but preferably 3-stars. Meanwhile, Fenrir/Ifrit/Giri are great for you even at 0-stars.