Weapon skills scale with whatever the stat for your weapon is, so they scale with int if you use a staff(can't use a wand cause it's not a melee weapon so it won't work with warfare skills). Staves do pretty poor damage however and the armor checks are still done on physical armor, which means most of the secondary effects from warfare skills are unusable unless you have someone else removing phys armor or you use geomancy(reactive armor) or necromancy to remove it.
Generally speaking, since the weapon skills aren't great, I'd recommend just doing either a caster with wand+shield, even if you take melee range stuff and warfare skills like shield throw, deflection, phoenix dive etc, or do a str based warrior with spells for support and utility rather than damage ones. Staff warfare is pretty meh and in pretty much every cases you're going to do more damage casting an actual spell than using a warfare skill to do damage.
I've encountered (continuing the Act 2 spoilers here)
