Triple Meld INT Lightning Brand VS Stardust Rod

[DarkHikaru]

I would like to ask your opinion,

Now I have 2 set of weapon,

1. Triple meld INT Lightning Brand (INT+50 M.atk potency+20 Lightning atk potency+12) with Flame Sergeant's Targe (INT+7)

2. Stardust Rod (INT+45 EnfeeMagic+20 M.atkPotency+30 ConserveMP+50 UpFlareDamage)

Which set do you think better?
For the first set I can get 57INT with better magic potency when use ThunderCombo.

But for the second set, the conserve MP ability sound attractive but so far I really dont see much different from it.

Do you think EnfeeMagic+20 ConserveMP+50 UpFlareDamage is worth enough to sacrifice 12 INT?

Thank you