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You asked about those setups, that is my opinion about them, what is wrong with that? none of those sets are designed for burst ganking. If you want to run a gank setup you need sets like alchemist, viper, flanking, etc.
If you want to play a ganker, you need to go full glass cannon. Otherwise you will end with a mediocre build that can gank bad players, and gets rekt by decent players that know how to react to a gank.
There are a lot of great armor combinations for ganking.
You really just need to find the combo that fits you.
I spent some time reaserching builds and trying different set combos. As well as adjusting skills and CP's. What I use now is a mix of things that I like personally and things I learned from other people.
The worst part is, the amount of gold I spent in the process. But now it's all been worth it.