I have tested 2x Liliana, the Last Hope on with two Mana sources - Bayou and Scrubland.
Here are the results:
Played against:
Grixis Delver x2, Elves, 2x Czech pile, UW miracle, and mirror.
I board it in every matchup and it was very good, gave me victory 3 times but her own. I found that it require one more black source to be enough to cast. I recommended second bayou, but it depends on build(running mom less, mid sfm package(5), with a lot (3) CA creatures like tracker or railler addition to core. Hugh advantage of Liliana was that it growth additional to removal which is enough to tick her to ultimate. For example I also test Garruk Rentless and big Nissa. Both was solid but wasn't so good as Liliana.
Walkers is another route to fight overwhelming removal from mid-range Czech pile decks.