Who to Vote for to get rid of Tim?

Hmmm, tonight's episode just ended so I thought I might actually vote this time to try to help someone worthy stay on the show. My favorites of the evening were Crystal and Lee, but they are definitely both very safe anyway. Instead I was curious if I could vote for someone so to help them stay on instead of Tim Urban who I find very unpleasant to watch perform. He is worse than the merely boring performers and makes watching an almost irritating experience. The problem is that the likely other two bottom performers are Didi and Katie, neither of which I actually enjoy watching either. I could vote for Siobhan for sympathy for her not so wonderful performance tonight, but she is most likely safe due to the popularity of her screeching (which I believe she does not need to perform so much to succeed.) I could vote for Big Mike since I thought his performance tonight was better than the one from last week although I do not understand why he performed behind the judges which seems unfair. Shouldn't all the performers be required to face the judges? I also do not understand the great praise for Andrew tonight. Although he did seem a lot more comfortable with his guitar again, and performed much better than previous weeks, I thought he was more prepared to play a bookstore or a coffee house instead of a concert. It was a great background music performance, but not a powerful "main event" type performance. I also thought Casey was loosening up a bit more which he definitely needed to do since he often seems too stiff when he performs. But as the judges all stated the best improvement tonight was definitely Lee who has always had a good voice, but this week is finally starting to not look like he is hiding from the IRS any more. There is something about his posture when he performs that seems a bit withdrawn. I think Big Mike has to give some of his "swaggerness" to both Lee and Casey so all three of them can have the proper amount of presence. Then there may actually be a male present who can actually compete with Crystal and Siobhan (who hopefully will improve again after tonight!).

My rankings and scores (just my personal opinion!):
1. Lee 9/10
2. Crystal 8/10
3. Casey 7.5/10
4. Mike 7/10
5. Aaron 6/10
6. Siobhan 5.5/10
7. Andrew 4/10
8. Didi 2.5/10
9. Katie 2/10
10. Tim 1/10