Alexis has said almost nothing about Parv, but has praised Amanda's game. Although I think Alexis may be a vote for Parv.
Alexis definitely votes for Parvati. They were very close on the show, and apparently continue to be friends, and according to Erik Alexis wasn't a big fan of Amanda. Alexis also got to see a lot of Parvati's game, and very little of Amanda's, so she'll probably see Parvati as more deserving as well. I think the positive stuff she said about Amanda was just in response to having seen that episode play out on TV. After seeing it on TV, she was able to say that Amanda "played it perfectly", but she probably knew very little about Amanda's game while she was actually there. I think it's the same as with Erik and Parvati. He says he thinks she played a great game now, but he also says he had no clue about it while he was there.