Tag is very useful since its lowers defense and resistance.
She can help you to nuke other teams, also its boost the dmg of Ignite and Poison too.
Like this you can make poison teams or use Ignite with Tobi.
Also, she c*e mystery in the first round, so you can pop down the debuff mirros with it, if you pair her with Ao for example. I used her with Ao for a very long time, Ao can give armor to the panda and if the enemy destroy Ao clone, then you c*e tag on them and after accu point too. Very useful agains Tobi mystery evasion as well, since he will just avoid the tag and after you can accu point with Ao.

The main thing what you need to keep in mind, she dont follow up any combo, only do dmg chase, so if you want to have a good use of her, you musst make sure to get the required number of hits. For example, if you gonna use earth main with standard shield, and 2 more ninja who do 1-2 hit with standard, u can forget seeing her chase, except if u can make it up with the combo. Thats why Konan is usefull for her, since her chase do like 10 hit alone.

Its up to you, what you prefer, if you want water main, then you can go poison route with GNW kiba and hinata + bull summon. And you can swap out Hinata for Konan after you got her.
Or even with water you can take Tobi and go ignite route.

Or you can change to fire and go full ignite, maybe even lighting would work to make crit dmg build.

I'll try her out with Tobi and hinata. I was also thinking maybe hinata sasuke for ignite and paralyze etc. but I'm staying water. Only level 67 so no ao yet.

cursed hidan with animal pain