New feature for allays - vex interception

What if allays could fight against vexes? This could be done by using spears.

Using an allay's ability to hold whatever the player gives them, allays could be given spears and used during raids as anti-vex combatants; considering the spear does more HP damage in accordance with speed, an allay could home in at a vex and do a dive at it with a spear, possibly even doing enough damage to one-shot it.

In my opinion, it won't affect the balance of the game much, considering vexes do a lot of damage to the player in one hit, can fly through walls and are very difficult to hit due to their size.