Adding Syndra to my champ poll

So like in title says i wanted to add syndra to my champion poll. And i have some guestions.

1. Is syndra a good blind pick?

2. When should i go luden or black fire torch

3.Whats her all in combo?

4.On which minute i should have full stacks on her?

1. Whats her powerspike.

2. Whats her early combo (before 6)

3. Hardest matchup?

4. Best skin for her