Reroll quest rewards?

[Cruciarius]

Just wondering if it's possible.
Just did a hard quest and the reward is the Spirit Garb. Keeps giving me 3 slots after several restarts.

[Vayne]

No, slots are fixed depending on difficulty level.
Normal=2 slots
Hard= 3 slots
Super= 4 slots

[Cruciarius]

Ah figured as much. Thanks.