Use it on Tenten, she gives crit to every ninja and crit is something you will always need.

Get both wind and both fire ninjas, since most p1 ninjas used right now, is those. After then you can go for any other you like.

Get cards opposite to the character element to get elemental resistance and max your position assist level.

the topic is about something entirely different to what you're talking about XD

Btw only 1 card can be in effect (ninjutsu and resistance to those elements in your lineup) during battle at one time just in case you didn't know

tenten 1st but you should go for all. that feature gives a ton power.

There is really no point of Tenten. Yes, it's for all team, but what's good for supports out of critical. It's not that much of crit also. It's useful only for group summon lineup. Well, 9tails too, but why would you do that.

aw man... now im super confused whether i should get tenten or not.. @@

Well, just ask yourself is it worth for your pos1 to have few crit %, or is it better to have atk/nin and res. Ofc if you have strong p1 and p2, then why not. Like KKZ and AGK.