Grixis Ramp?

I'm building a [[Sauron, the Dark Lord]] discard focused deck, and I'm having trouble ramping to him fast enough. Once I have him, I get all the lands I'd ever want, but it's not like I'm in green and can play a bunch of stuff to let me drop more of them.

I figured I'd need a lot of mana rock ramp (namely the talisman) but not sure if that's good enough? I'm not trying to spend a bunch of money on chrome mox and stuff like that, but I feel like there's probably better options.

Here's a current paper version of the deck

https://archidekt.com/decks/12064038/sauron_new

Gloin is not as good as I thought, since I missed I only get one treasure a turn.

I figured I would want things like [[Bone Miser]] and [[Surly Badgersaur]] but I just don't have paper copies yet.