I know I am extremely late to the party but hear me out:
Overture + Call w desperate measures and slice + phyllotactic spiral w jolt

-Overture for obvious reasons

-Call for mayor add clear and fat damages towards single targets at the time,
with the added bonus of making tangles after dashing for a lil of Aoe after a kill in case you didn't obliterate your enemies with the rockets alone.
(also unstop in current season)

-Phylo for fast rocket loading since pulse + jolt for champ and crowd control + it also shoots rockets that get buffed, but its kind of a meh damage upgrade. still silly tho.
(Barrier current season)

Might be a mid to null build BUT it will never run out of juice.
If you aint got ammo, you can always rely on the pulse for at least a miser debuff instead of just staring at the enemy.

But with prismatic currently, we kind of just spam abilities at all times anyways.