IcePrison and ThunderHammer Cooldown...

[Prog]

In general suggestions like this need to be made with a precise reasoning. Just saying "do x" is not enough, you need to shed light on why you suggest this change. (A simple "too strong" is a start, but preferable you could point to situations in which any imbalance can be seen, or point to the frequency of those tanks being used, which is usually a good sign for balance issues.)