Is worth trying to get np2 tamamo Lancer?

I say safe ur SQ for jalter, but if u really want martha u can try to get her.

But i think jalter maybe more worthy to spend ur SQ since she is a really strong 5* avenger ...

Edit : NP2ing a 5* servant is kind a worthless since only boasts the NP damage with the cost of more SQ to spend. Well, disclaimer : roll for the servant u like the most