OpenRA

My original attempt was by using Gattling logic but unfortunately it does not suit well because once the target is destroyed, the cryo weapon holder will instantly freeze the next target if the target is just nearby.

If only there is another logic on AttachEffect that will trigger after a number of attacks with the same type of AttachEffect. Something like, the more cryo weapon holder units attacks a target, the faster the target will get frozen but unfortunately I think Ares has not go that far.

You could try looking at the combined arms mod, I think it has cryo weapons.