Some questions about keeping Viconia in my Good party

While I didn't use Viconia in the original game I made her a party member in SOD since I liked her new portrait and I remember I liked the character 10 years ago when I first played the games. I Imported the Helmet that changed alignments that I had in the first game to keep her happy and she was the one I romanced.

In BG 2 my party consists of MC/ Cavalier 2H, Anomen, Aerie, Jaheira and Nalia(to be replaced with Imoen when I get her back). So my questions are:

  1. How viable would be in my new party considering that unlike the previous games this time my party is full of healers? Would I be better served by keeping Nalia after Imoen returns or taking Neera (the one I romanced in the first game).

  2. If I keep her how should I gear her?

  3. If I give her the Helm of opposite alignment would I be able to change her alignment from evil to neutral?

  4. While I realize that this question is extremely subjective, how do you rank her romance compared with Neera's or Aerie's in BG2? especially considering my Cavalier MC.