Well I don't really like sliding my index finger all that much if it's not necessary. I think I'll stick with 1-1-4-1-1-3-3-3-4-3-3-3-1
Also, I alternate pick it. I had to give my fingers a day of rest. I went at it hardcore for like five days and I guess my fingers just weren't ready for the torture.
What a beautiful song if you can get it down. Especially once you get done with the arpeggios and you can play the final lick. I love it!