Although I don't have much experience with INT builds, this is what I have gathered.
Pure INT s/s: Decent damage, good defense for shield.
Pure INT spear: Amazing damage, very little defense.
Hybrid Spear: Decent to good damage, decent defense (more HP also because of the passive/str points)
Hybrid S/S: Decent-ISH damage, very good defense due to shield and extra hp.
The pick is yours

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Ooh, I got a sexy ex-staff title!