From my perspective this team would be better off with killer bee since he buffs roshi and naruto, also those shields. Bringing mei could give some poison but not much. Chase already has a control element with yagura acupuncture. And not much use for Mei's barrier since you would be breaking it with roshi.

But overall Mei is a good ninja, and you have various team possibilities with her with water main and fire main. Getting her in kage treasure involves a huge amount of RNG since kage treasure pool is too big.

Correct me if I'm wrong, but:

Mei doesn't buff male ninjas. Her damage "towards" male ninja is amplified by 25%. That's why I think some players stack on her atk/nin, crit, pen and injury to make use of the flat bonus % damage.

Lol...sorry...true..my bad...I cant find any benefit of her in that team other than her chase which is replaceable..her barrier is useless since no water ninjas are there ...its good the way it is...and Allyriane is right Mei does 25% more damage to males..

NO Mei wont make this team better from my perspective. But you can still try for her since she has lot of other teams where she can work with as i have already mentioned. But that too again is a choice, since putting in kage treasure may not necessarily give you Mei, you could end up with a whole other rares and dupes. You may very well go for the cloud treasure and get papa raikage, It's a tough choice which treasure to go. Plan a team which you want and try those treasures, but some treasure have high uncertainity.