>>545276771
Nothing affects her summons besides the ASPD.
Use those 3 I have equipped and the 4th one if you can afford it. After that just put range on it. ATK doesn't matter that much since you're mainly using it to buff your jellyfish.
The 25 cost mod is for movement tech. Spamming that charged attack is the best and fastest general movement in the game right now, minus stuff like Truffle.