Maximum damage

It seems that at rF the hydras have 3 ticks, because it hits 3 times from the start of the duration. Then at rE it somehow has 4 ticks and can hit 4 times on one enemy who stays there.

15 second duration and 3 ticks means 5 second per hit? but in the 16 second duration for rank E, it hits 4 times so it's much shorter. At rank 1 with a lot of masteries in Battle Alchemy, Hydra Transmutation is practically the strongest skill in the game in regards to total damage done without needing assistance, since it has a 60 second cooldown but 30 second duration at rank 1. It practically ignores def/prot and such so it can hurt monsters that can't be normally hurt with some powerful skills.

The problem is the stationary of the target and the range to use it, meaning it's only best when you have way to stunlock or freeze a enemy in one position for up to 30 seconds, which most huge bosses and strong bosses won't do.