Spend nx on extra pendant slot or guard/shield scrolls?

Alright so i have 20k nx and want some input on what i should use it on. Basically which one will have a higher payout in the long run.

Options:

using the guard scrolls to scroll a lion heart cape with the berserk scroll i have. Amount of nx:16,730 (7 guard scrolls)
Using shielding wards to aee my lionheart axe. nx:15,000 (3 shield)
Pendant Slot nx:12,900

Thanks