I'll give my personal take.
× Sailor Moon: She's an interesting one, I'm torn on picking her because the silver crystal is not a well defined weapon and I don't know how affective it would be in killing a human. I would rather not take risks if I have a choice, so that's a NO for me, if I picked her it would strictly be so she doesnt kill me and not really to fend off the other Senshi.
× Sailor Mercury: She's smart, but technically the weakest grown up Senshi, so I'll have to go with a NO on her too.
That and also water/ice isn't as dangerous as other powers the senshi have, so even if she were to hit me, it would likely not kill me.
× Sailor Mars: Powerfull, but when compared to other senshi she realistically stands little to no chance. She has her uses, but in a brawl she would be one of the firsts to go down, another NO for me.
☆ Sailor Jupiter: She's the powerhouse of the inners and one of the strongest of the whole team. She would be able to stand a chance a against the majority of the inners (counting as a 1v1 scenario).
Plus if just one of her lightning bolts manages to hit me I'm dead, given how electricity is one of the deadliest elements for humans.
So she's a keeper, mostly due to the fact that she can kill me easy, with the added bonus that she's a strong fighter.
× Sailor Venus: More or less the same as Mars, powerful, but ultimately not strong enough.
That's a NO for me, she does have a sword, which is kind of scary, but if I have to choose a sword fighter I'd rather go with the next option.
☆ Sailor Uranus: She's strong, very determined when it comes to killing and has a weapon that could actually kill a person.
A must pick in my opinion, she's like the hunter in the animal pick, the best option to have on your side AND to not have against you.
× Sailor Neptune: She exists, sorry NO.
Not that she's weak, but she has nearly not combat qualities.
Her attacks are not very deadly, she's does play the violin, which is sort of useful for about 2 seconds of distraction and that's really it. She can create a shield, but why focus on defense when the offense method offers more vailabilty.
× Sailor Pluto: I would have considered her just because she can stop time, but when evaluating the options I came to the conclusion that she's not worth it, much like Saturn.
She has her one deadly move that can and will definitely kill me, but in terms of fighting she doesn't have much to offer, NO, although she was a tough one, her and Jupiter came so close.
× Sailor Saturn: If I were to pick her it would purely be just to not have her destroy me with the rest of the universe, but if I do keep she's not going to do much. Her strength lies in destruction, which is not ideal when you're also trying to protect someone.
So, NO, because she would either get killed by the other Senshi because she's not a great fighter or she would kill me and along with them and the rest of the universe.
× Sailor ChibiMoon: NO.