I am cheering for Mio to hook up because Chisato and Zest are the equivalent to cougars going for Basara because they are both old enough for that because how old is Chisato because the cougar traits falls on her, and she should be ashamed in going with a person much younger than her but Zest can be forgiven because the live a very long life because of his race but she is older than the rest of the girls. 

You're cheering for Mio becaue you like her. That is fine, you don't neet to make up BS reason to not like the other girls because of that bias.

I'm cheering for Yuki because she at least puts in effort.  Leting Basara know  point blank she is interested and even puts in work to help. I episode 8 of that Anime when all of them get home Yuki has dinner cooked and is trying to get some loving out Basara. What does Mio bring to the table? Nothing.

The only real reason Mio is bonding with Basara is because of Maria's curse. As it stands right Basara is just her guard dog that doubles as a vibrator when needed. They have little to no converstaions, spend minimal to no time getting to know each other, Mio puts no kind of effort into the relationship, so far it has all be outside parties for them to even have a reason to interact with one another.  

Chisato and Zest, regardless of age, both still have a concept of putting effort. They both get more credit that over Mio.

The thing of Zest and Chisato aren't they cougars in definition to Basara because to me they are too freaking old for Basara, and regardless of what a stud Basara is I have seen Chisato used him like a toy when it comes to sexual matters that lady is too much for Basara to handle because he had a dream about her inside a Steam Room having sex but he passed out like a dork.

I can understand that he is great in fighting but Zest and Chisato own him in sexual matters because compared to those girls he is like a little boy.

And record shot put for furtherst distance from the point goes to.

every teenager is a little boy if he goes with chisato and zest...

so the scene between Basara and Chisato in the bathroom of her appartment was a dream?

The scene was a dream of sorts but Chisato did gave him oral sex much later on the series but he never got as far as penetrating her so he is still is a virgin, and I am beginning to wonder why are the writers of the series still doing the High School Dxd thing of teasing the hell out of the Main character sure he gets much closer than Issei has gotten but he is still hasn't crossed the line yet.

isnt the thing with chisato suppsoed to be a sort of insest :P in the wiki it says it his aunt :P

Did you forget about Yuuki and Maria and kurumi.

I mean they are not out from the race.

I personally like Yuki although it's going to be a Mio ending likely, but i guess i'm just a fan of petite girls