User:SaltProphet
236X
623X
j236X
j214X
Rekka
4BC
Item pickups
Summon pickups
Lasers
The real star here is the B version, that provides tons of meter as a finisher and can anti-air for a fatal starter.
623X
Starts, extends, and finishes combos, most of Neco-Arc's combos will use at least one version of this move.
Rings
Moon and A rings can extend combos, with A ring being mandatory for her BNB, while the C version provides a knockdown.
Rocket
Can start, extend, and finish combos, like 623X.
Rekka
Basically reliable damage, but the variation in usage is worth exploring.
4BC
Invincible starter, therefore receiving huge damage reduction, but hits fullscreen and launches for a combo into oki. Can sometimes be followed up from a laser or 2C > 5[B] to forego the damage reduction and provide corner carry.
Converting from items
Neco-Arc can knockdown from combos initiated by her 421A items, though they are usually heavily prorated or shorter than her usual combos. Still, the furthered access to oki or more setplay cannot be overlooked.
Converting from summons
Neco-Arc can knockdown from combos initiated by her 421B/22B/2BC summons, though they are usually heavily prorated or shorter than her usual combos. Still, the furthered access to oki or more setplay cannot be overlooked.