For this you'll need the following units:

Sakura Miku (Lead) Avant (Friend/Lead) 2xRize or 2x Luda A spark buffer (I use Elza) Sirius (Can be changed for Anything else if you use Lauda)

Basically, you'll want to perfect spark your nukers and Sirius is to give Light element, Sakura miku is the only lead that has a status null with a nuke potential, you'll use the following squad positioning:

Rize l Avant

Sirius l Miku

Rize l Elza

With the following order

6 l 3

2 l 1

4 l 5

for spheres, I used normal spark ones for the Rizes WDB other spark spheres, Medblare Sacred axe for Avant, Elza was Andaria's Bow Silver knight's crest and Sirius was Mora's sphere and the drill hall FG sphere Iirc.

I know this set up excludes a lot of people because of Sakura miku (even myself I use a friend miku) but is the only set up I could find, Melord and Kulyuk's LS are too weak for the nuke.