In my experience using the creepers rarely works to your advantage. I have seen many players damage or kill themselves when using them. But if you try to actually use them, the gameplay becomes very different from any other game and I don't want that to happen in random op duels. If you don't use the creepers at all, that kit has no right to exist and might as well be removed completely. So in addition to moving the kit to the insane section, it should also be changed to make the creepers more useful, for example by changing the AI of the creepers to prefer targeting the player that did not spawn them initially.