Wortox's Soul Decoy II & III should be separate as different branch but not in a line.

[Steorra]

After several gameplay by using Wortox, I found that the Soul Decoy II & III has their different uses in different scenarios. You can't say which one would be better than others (the fact is all of them are a bit useless on average but, they still ok for me). I think Soul Decoy III have no reason to be locked behind the Decoy II but should go a different branch with Decoy II.

At the same time of this suggested change, I hope Decoy II could get some improvement. It's a bit low efficiency in the scenario where it should be good. I think Decoy II should increase some HP of the decoy as additional perk for ensure this skill could do what it intended to do. Or the duration of the decay would be meaningless once your enemy has massive damage output.