Notice how nothing (except Axes) gives an initiative bonus. Notice how nothing is immune to counter attacks.
Maybe horses/wargs could make units immune to counter attacks instead? Maybe spears are the only weapon that still gets a counter attack vs a mounted user? (Spears +1 counter attacks vs mounted units?)
As far as magical staves ... possibly even wands ... I think little to no weight, very low attack, some dodge, some initiative, and a moderate amount of spell mastery/ spell resist.
Decent, starting level MAGICAL staff = 3 attack, +2 initiative, +5 spell mastery. 0 weight. (1-handed)
A high end MAGICAL staff = 5 attack, +4 initiative, +15 spell mastery, +10 spell resist, +5 dodge, +10 ranged dodge. 0 weight. (1-handed)
Whereas normal, non magical staves ... something like 4 or 5 attack, +2 initiative, 5 weight, and then later 10+ attack, 10 dodge, +4 initiative, 10 weight. (2-handed).
Mundane staves 2 handed ... Magical staves 1 handed.
Shield slot can be used by a magical bracelet instead of a shield ... bracelets can either increase damage, decrease tactical mana costs, or increase spell resist/ elemental resists.