ice grenades do 45 damage with a 3 second cooldown so then with the halved cooldown it becomes 1.5 seconds add hell rain doing 13 damage x1-6 bombs and anything dies in seconds besides anvils insanity of a shield personally the sledgehammer should keep 50% cooldown but it should be like 10 seconds and you need like level 30 to unlock it and it needs some hard counters like fire damage or something bc its broken and trust me that's from someone who uses it to get on the leaderboard

however, i think ice grenades are fine its sledge that makes them op so this is more of nerfing sledge then the ice grenades.

edit; a user suggested that the sledge is fine as it is its the other character's that need to be buffed to her level