I would be on the fence too. Lil and Lili are nice, but I don't love Lilith. I would opt for something like Lilibet or Lilibeth, personally.
Of your Lilith in the middle combos, I like Claudia Lilith.
Of your Lilith in front combos, I like Lilith Ember. Lilith Fiona is a bit tongue-twister-y and Lilith Ivy is too flower/plant-y. I would like Lilith Eva too.
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589
"My Inner Birthing Mother Paddles a Canoe" and other non-name musings
found on my blog:
http://jodifriesen.blogspot.ca/2014/07/paddle-power.html