No I'm not.
Like many of the above posters, I used to be a huge AnKen fan (and a fan of Ankita/Karan's jodi). In fact, they were what had gotten me hooked to the show again. But I cannot stand to see Ankita with Naren anymore.
Thinking back on it, Ankita never really loved the real Naren. She only loved the mentally imbalanced version of him. This version was a genius, philanthropist, generous, honest, happy-go-lucky type of guy. And he doted on Ankita as Ahana. The actual Naren is (or at least was) business minded, rude, snobby, dishonest type of guy. So I mean technically, she never loved Naren for who he is. Even the memories of Naren she was living with, were memories of when Naren was mentally unstable. All the sacrifices she made (including reuniting Naren with Pari) were for that previous Naren. Personally, I think that they were two different people in the same body.
And Secondly, Naren did not love Ankita, at least not in my opinion. Even when married to Ankita/ Ahana, he didn't necessarily try to get to know Ankita as a person. He treated her as he treated the past Ahana. I remember whenever Ankita tried to deviate away from the Ahana image or like put in her own likes/dislikes, Naren wouldn't like it and would try to remind her of how she used to be (i.e. Pari). Like he'd actually scold her sometimes for not being like her old self, but nobody took it seriously because Ankita herself usually just laughed it off. Basically, he just loved Ahana
And thirdly, I can't get behind AnKen because of the way Naren treated her when he was cured. He literally threw her out of his house, insulted her, and let her leave her family when pregnant. Like he could've acted like a decent human being, but he treated her absolutely terribly, with no provocation. The mentally unstable Naren would've at least given Ankita (or any pregnant lady who worked in his office) some money and a place to stay or anything. The normal Naren didn't even say anything. If Ankita goes back to him, I'll be so pissed off.
Personally, I'm totally for RanVita. He loves her so unconditionally. And honestly, he reminds me a lot of the old Naren, but in like a harsher way. Ranvijay has shown himself to be generous, honest, responsible, and understanding. I'm hoping she realizes this and marries him for himself, and not just Vaishnavi.
And as for that last question of whether I will support AnKen if Naren goes back to being his old self, it would depend on how his transformation happened. If Naren turns mentally unstable into the nicer version of himself again, I won't really want her to get back with him because Ankita deserves better than someone who is mentally unstable. If Naren turns good through a personal journey of misery and whatnot, I won't want her with him because, again she deserves better.